'Heavy' history: ULA launches final Delta rocket after 64 years (video, photos)
The liftoff of the last-ever Delta rocket today (April 9) brought with it a change in the way the U.S. sends satellites, interplanetary probes and spacecraft into Earth orbit.
!['Heavy' history: ULA launches final Delta rocket after 64 years (video, photos)](https://cdn.mos.cms.futurecdn.net/wfP6di8bxwGR9RepzeNSET.jpg?#)