CAPE CANAVERAL, Fla. (AP)– The launch of a SpaceX rocket ship with two NASA astronauts on a history-making flight into orbit has been cancelled with 16 minutes to enter the countdown since of the threat of lightning.

Liftoff is rescheduled for Saturday.

The spacecraft was set to blast off Wednesday afternoon for the International Space Station, ushering in a new period in commercial spaceflight and putting NASA back in the busines