The next satellite to launch from Cape Canaveral — an essential communications satellite for the U.S. military and allied nations — was moved to the pad and mounted atop its Delta 4 rocket today.

Europe’s first mission to Mercury, a quartet of Galileo navigation spacecraft, the world’s first global winds observatory, and a new European weather satellite have arrived at an equatorial launch base in French Guiana in preparation for launches in the coming months.

The launch of a Boeing-built Mexican communications satellite on a Proton rocket has been postponed after engineers discovered an anomaly on a similar spacecraft.