Live coverage: Three-man crew closes out 173-day space mission

In nearly five years on the job as Boeing’s Space Launch System program manager, John Shannon has presided over the completion of the first SLS core stage inside a cavernous factory in New Orleans.

An Ariane 5 rocket launched from French Guiana at 2150 GMT (5:50 p.m. EDT) Thursday with a pair of European-built communications satellites for the Brazilian government and KTsat, a South Korean telecom operator. Liftoff was delayed more than one hour to resolve a problem with ground equipment.

The U.S. Air Force’s fourth new-generation SBIRS missile warning satellite is headed for geosynchronous orbit after lifting off from Cape Canaveral at 7:48 p.m. EST Friday (0048 GMT Saturday), after a one-day delay caused by a troublesome fill-and-drain valve.