A police robot helps defuse an explosive situation at the White House, in this photo gallery of machines in risky times.
Bomb squad robots to the rescue
A police robot hands a piece of communications equipment to the driver of a red van at the scene of a standoff between the driver of the van and police, one block from the White House, two days before the second inauguration of President Bush. The driver reportedly threatened to blow up 15 gallons of gasoline he had in the van if he did not get his child back--a domestic dispute, rather than terrorism.
This urban robot (Urbie) with stair-climbing abilities is a joint effort of NASA's Jet Propulsion Lab, iRobot, the Robotics Institute of Carnegie Mellon University and the University of Southern California Robotics Research Laboratory.