Video: Take a virtual ride on the Atlas 5 launch pad emergency ziplines

The Leo Atlas 07 mission was the second to last flight that Amazon booked on a United Launch Alliance Atlas 5 rocket. Liftoff from pad 41 at Cape Canaveral Space Force Station happened at 7:53 p.m. EDT (2353 UTC).

For the second day running, bad weather at Cape Canaveral forced the postponement of the NROL-52 satellite launch. Today, the weather officer stopped the countdown with 97 seconds left.

The launch faced long odds with poor weather in the forecast for a fourth day in a row, but SpaceX was able to launch from pad 40 at Cape Canaveral Space Force Station on Thursday, Sept. 11, at 9:56 p.m. EDT (0156 UTC).