Stats: Atlas 5 and Delta 4 histories and backlogs (updated April 20)

A United Launch Alliance Delta 4-Heavy rocket is awaiting liftoff with a classified U.S. government spy satellite at Vandenberg Air Force Base’s historic Space Launch Complex-6, a picturesque rocket facility that was once intended to support launches of military astronauts and space shuttles.

Two U.S.-built Intelsat communications satellites have hitched on to an Ariane 5 rocket for launch from French Guiana next week, the first time the storied company has put two of its spacecraft on the same booster.

A highly sophisticated U.S. Air Force satellite to sound the alarm when an enemy missile launches has shipped to its Florida launch site for liftoff in October aboard a United Launch Alliance Atlas 5 rocket.