Bad news for air safety and government accountability: a military electronic warfare test appears to have killed everyone aboard a medical flight.

• A small medevac plane leaving Roswell, New Mexico crashed into a mountainside in May, killing both pilots and two medical workers.
• The cause was a GPS jamming test at the White Sands Missile Range that knocked out the plane's navigation in low visibility.
• Three other planes reported the same navigation problems, making this the first known case of a military jammer downing a civilian plane in US airspace.
• Earlier this year the same region saw El Paso's airport shut down after an experimental laser weapon was fired at what turned out to be a party balloon.
• Air traffic control was stretched far past capacity during the exercise, and the crew was given little warning before flying blind into the peak.

Outlook: Expect scrutiny of why experimental weapons are being tested near busy civilian air routes, though so far the crash is drawing little attention.