



Bush Signs Law Widening Reach for Wiretapping
By James Risen
The New York Times
Monday 06 August 2007
Washington - President Bush signed into law on Sunday legislation that broadly expanded the government's authority to eavesdrop on the international telephone calls and e-mail messages of American citizens without warrants.
Congressional aides and others familiar with the details of the law said that its impact went far beyond the small fixes that administration officials had said were needed to gather information about foreign terrorists. They said seemingly subtle changes in legislative language would sharply alter the legal limits on the government's ability to monitor millions of phone calls and e-mail messages going in and out of the United States.
They also said that the new law for the first time provided a legal framework for much of the surveillance without warrants that was being conducted in secret by the National Security Agency and outside the Foreign Intelligence Surveillance Act, the 1978 law that is supposed to regulate the way the government can listen to the private communications of American citizens.
"This more or less legalizes the N.S.A. program," said Kate Martin, director of the Center for National Security Studies in Washington, who has studied the new legislation.
Previously, the government needed search warrants approved by a special intelligence court to eavesdrop on telephone conversations, e-mail messages and other electronic communications between individuals inside the United States and people overseas, if the government conducted the surveillance inside the United States.
Today, most international telephone conversations to and from the United States are conducted over fiber-optic cables, and the most efficient way for the government to eavesdrop on them is to latch on to giant telecommunications switches located in the United States.
By changing the legal definition of what is considered "electronic surveillance," the new law allows the government to eavesdrop on those conversations without warrants - latching on to those giant switches - as long as the target of the government's surveillance is "reasonably believed" to be overseas.
For example, if a person in Indianapolis calls someone in London, the National Security Agency can eavesdrop on that conversation without a warrant, as long as the N.S.A.'s target is the person in London.
Tony Fratto, a White House spokesman, said Sunday in an interview that the new law went beyond fixing the foreign-to-foreign problem, potentially allowing the government to listen to Americans calling overseas.
But he stressed that the objective of the new law is to give the government greater flexibility in focusing on foreign suspects overseas, not to go after Americans.
"It's foreign, that's the point," Mr. Fratto said. "What you want to make sure is that you are getting the foreign target."
The legislation to change the surveillance act was rushed through both the House and Senate in the last days before the August recess began.
The White House's push for the change was driven in part by a still-classified ruling earlier this year by the special intelligence court, which said the government needed to seek court-approved warrants to monitor those international calls going through American switches.
The new law, which is intended as a stopgap and expires in six months, also represents a power shift in terms of the oversight and regulation of government surveillance.
The new law gives the attorney general and the director of national intelligence the power to approve the international surveillance, rather than the special intelligence court. The court's only role will be to review and approve the procedures used by the government in the surveillance after it has been conducted. It will not scrutinize the cases of the individuals being monitored.
The law also gave the administration greater power to force telecommunications companies to cooperate with such spying operations. The companies can now be compelled to cooperate by orders from the attorney general and the director of national intelligence.
Democratic Congressional aides said Sunday that some telecommunications company officials had told Congressional leaders that they were unhappy with that provision in the bill and might challenge the new law in court. The aides said the telecommunications companies had told lawmakers that they would rather have a court-approved warrant ordering them to comply.
In fact, pressure from the telecommunications companies on the Bush administration has apparently played a major hidden role in the political battle over the surveillance issue over the past few months.
In January, the administration placed the N.S.A.'s warrantless wiretapping program under the Foreign Intelligence Surveillance Act, and subjected it for the first time to the scrutiny of the FISA court.
Democratic Congressional aides said Sunday that they believed that pressure from major telecommunications companies on the White House was a major factor in persuading the Bush administration to do that. Those companies were facing major lawsuits for having secretly cooperated with the warrantless wiretapping program, and now wanted greater legal protections before cooperating further.
But the change suddenly swamped the court with an enormous volume of search warrant applications, leading, in turn, to the administration's decision to seek the new legislation.
excerpt from a BBC interview with J.G. Ballard:
"Virtual reality is something slightly different. I mean I take for granted that eventually virtual reality systems will be available to us which create a simulated reality that is more convincing than that which our central nervous systems create. I mean one must remember the brain is itself a virtual reality machine, the illusion we have of the real world, of factories and streets and office blocks and other people talking to us is itself a virtual reality simulation generated by our brains.
I think when the first true virtual reality systems become available, and contain more visual information and are more visually convincing than ordinary reality, the temptation for the human race will be to enter this virtual reality system and close the door behind it. I mean, I think there's a danger there because one will really be able to enter into a fantasy world which, unlike all fantasies in the past, would be more convincing than everyday reality."
![]() | ![]() Runbot can adapt to changes in the terrain (Credit: Manoonpong et al) ![]() |
RunBot is a self-learning, dynamic robot, which has been built around the theories of Nikolai Bernstein.
"Getting a robot to walk like a human requires a dynamic machine," said Professor Florentin Woergoetter.
RunBot is a small, biped robot which can move at speeds of more than three leg lengths per second, slightly slower than the fastest walking human.
Bernstein said that animal movement was not under the total control of the brain but rather, "local circuits" did most of the command and control work.
The brain was involved in the process of walking, he said, only when the understood parameters were altered, such as moving from one type of terrain to another, or dealing with uneven surfaces.
The basic walking steps of RunBot, which has been built by scientists co-operating across Europe, are controlled by reflex information received by peripheral sensors on the joints and feet of the robot, as well as an accelerometer which monitors the pitch of the machine.
These sensors pass data on to local neural loops - the equivalent of local circuits - which analyse the information and make adjustments to the gait of the robot in real time.
Information from sensors is constantly created by the interaction of the robot with the terrain so that RunBot can adjust its step if there is a change in the environment.
As the robot takes each step, control circuits ensure that the joints are not overstretched and that the next step begins.
But if the robot encounters an obstacle, or a dramatic change in the terrain, such as a slope, then the higher level functions of the robot - the learning circuitries - are used.
About half of the time during a gait cycle we are not doing anything, just falling forward
The latest findings of the robot research study are presented in the Public Library of Science Computational Biology journal.
Four other scientists - Poramate Manoonpong, Tao Geng, Tomas Kulvicius and Bernd Porr - are also involved in the project, which has been running for the last four years.
Professor Woergoetter, of the University of Gottingen, in Germany, said: "When RunBot first encounters a slope these low level control circuits 'believe' they can continue to walk up the slope without having to change anything.
"But this is misguided and as a consequence the machine falls backwards. This triggers the other sensors and the highest loop we have built into RunBot - the learning circuitry - and from that experience of falling the machine knows that something needs to be changed."
Dynamic process
He said human walking was a dynamic process.
"About half of the time during a gait cycle we are not doing anything, just falling forward. We are propelling ourselves over and over again - like releasing a spring.
"In a robot, the difficulty lies in releasing the spring-like movement at the right moment in time - calculated in milliseconds - and to get the dampening right so that the robot does not fall forward and crash.
"These parameters are very difficult to handle," he said.
All these big machines stomp around like robots
RunBot walks in a very different way from robots like Asimo, star of the Honda TV adverts, said Prof Woergoetter.
"They are kinematic walkers - they walk step by step and calculate every single angle, every millisecond.
"That can be handled through engineering but it is very clumsy. No human would walk like that. All these big machines stomp around like robots - we want our robot to walk like a human."
The first step in building RunBot was creating a biomechanical frame that could support passive walking patterns.
Passive walkers can walk down a slope unaided, propelled by gravity and kept upright and moving through the correct mechanical physiology.
Prof Woergoetter said: "Passive walking looks pretty realistic - but that's level one. On top of this we have local circuits, nested neural loops, which operate between the muscles (the joints of the robot) and the spinal cord (the spinal reflex of RunBot)."
He said RunBot learned from its mistakes, much in the same way as a human baby.
"Babies use a lot of their brains to train local circuits but once they are trained they are fairly autonomous.
"Only when it comes to more difficult things - such as a change of terrain - that's when the brain steps in and says 'now we are moving from ice to sand and I have to change something'.
"This is a good model because you are easing the load of control - if your brain had to think all the time about walking, it's doubtful you could have a conversation at the same time."
Nervous system
The principle was first discussed in the human nervous system by Russian physiologist Nikolai Bernstein.
Prof Woergoetter said: "He said it made sense that local agents, local networks, do the basic job, but the brain exerted control whenever necessary."
So using the information from its local circuits RunBot can walk on flat surfaces at speeds of more than three leg lengths per second.
Prof Woergoetter said RunBot was able to learn new walking patterns after only a few trials.
"If walking uphill, the gait becomes shorter, the robot's upper body weight shifts forward," he said.
The key lesson from the study, he said, was that the nested loop design first proposed by Bernstein more than 70 years ago "worked and was efficient".
He said the challenge was now to make RunBot bigger, more adaptive and to better anticipate situations like change of terrain.