4th flight fizzles for NASA's Mars helicopter, retry Friday

CAPE CANAVERAL, Fla. (AP) - NASA’s Mars helicopter fizzled Thursday on its fourth flight attempt.

The 4-pound (1.8-kilogram) helicopter named Ingenuity was supposed to lift off on its longest, fastest flight yet, after three successes. But the chopper remained on the ground.

Flight controllers at NASA's Jet Propulsion Laboratory ...