Photos: Delta 2 rocket blasts off with SMAP satellite

A replay of the United Launch Alliance Delta 4 rocket launching the Air Force’s Wideband Global SATCOM communications satellite No. 7 from Cape Canaveral, Florida.

Air Force meteorologists are expecting good weather to launch the Delta 4 rocket with a military communications satellite when the sun goes down Friday evening at Cape Canaveral.

Set to fly in its most powerful configuration with five solid rocket boosters, a United Launch Alliance Atlas 5 rocket rolled out to Cape Canaveral’s Complex 41 launch pad Tuesday in preparation for a planned blastoff two days later with a U.S. military communications satellite.