The Bush administration has approved measures that will greatly expand the spying capabilities of domestic law enforcement and other agencies. A new program will allow state and local officials to view data from satellite and aircraft sensors that can penetrate cloud cover, buildings and underground facilities. Most of the surveillance technology has previously been limited to foreign surveillance. Civil liberties groups are raising concerns. Kate Martin of the Center for National Security Studies called the program “Big Brother in the Sky.” She added: “They are laying the bricks one at a time for a police state.”