Centripetal and centrifugal forces are central to circular motion, but they're not the same. Discover the differences between ...

Only five days have passed since President Donald Trump signed an executive order to federalize the D.C. police force. Since then, the city has seen everything from a sandwich-throwing Department of ...

As President Trump threatens to use U.S. special forces against drug cartels abroad, a new book, The Fort Bragg Cartel: Drug Trafficking and Murder in the Special Forces, reveals some of the most ...

President Trump has not committed to adding American forces to the mix in Ukraine. No one has detailed publicly what form defenses would take, but there are several options. By David E. Sanger ...