They need to be small enough to be concealed because it won't do any good if a GPS tracker for kids is conspicuous to others. A tracker hidden in a child's bag gives parents more peace of mind.

U.S. Immigration and Customs Enforcement has reached out to contracts for new surveillance technologies in preparation for ...

The Space Force is targeting $50 to $80 million per satellite — a fraction of the $250 million it costs for just one Lockheed ...

A compressed-air gun mounted on the body of a pursuing vehicle fires a dart that attaches itself with heated glue to the ...