The stacking of a United Launch Alliance Atlas 5 rocket this week at Cape Canaveral signals the start of a busy six-week campaign to ready ULA’s trusty workhorse launcher for its debut in a new human-rated configuration in mid-December.

The United Launch Alliance Delta 4-Heavy rocket, standing 235 feet tall and weighing 1.6 million pounds fully fueled, unleashes 2.1 million pounds of thrust from the three RS-68A main engines at 1:51 p.m. EDT (1751 GMT) today to launch from Cape Canaveral on NROL-37.

A SpaceX Dragon cargo ship arrived at the International Space Station Sunday with more than 5,700 pounds of supplies and experiments. The supply ship was captured by the station’s Canadian-built robotic arm at 5:05 a.m. EST (1005 GMT).