The nation’s aviation infrastructure is again under scrutiny, following a series of paralyzing communications and radar outages at some of the country’s busiest airports. Here is a look at the scientific origins of radar.
airplane
Posted inNPR
Questions about helicopter’s path could prove key in Pentagon probe of midair crash
Among the unanswered questions about the crash near Washington, D.C., are the flight pattern of the Black Hawk helicopter and the exact nature of its training exercise.
