A record U.S. arms deal with Saudi Arabia is part of an effort to put pressure on Iran, partly by strengthening alliances with oil-rich neighbors also concerned by Iran's rise.
Two experimental US missile defense satellites have passed a series of vital tests in space, successfully spotting three missile launches and relaying their data back to Earth.
The missile defense system deployed in Kauai in response to North Korea worries has been tested successfully several times, but never in combat.
The US deployed antimissile defense systems in response to reports that North Korea could launch a long-range missile toward the island early next month.
Even rocket scientists forget to wipe their hard drives. Here’s how to do it.