NTSB Identifies Causes Of D.C. Midair Crash

The National Transportation Safety Board says investigators uncovered multiple factors in the Jan. 29 midair collision over Washington, D.C., that killed 67 people and will present findings Tuesday with safety recommendations. The probe found the Army Black Hawk flew higher than allowed and relied on a faulty altimeter, and it faulted the FAA for failing to act on prior warnings; the FAA is making temporary restrictions permanent.