but also on a series of rockets dating back to the early days of the space race. Delta II is the ultimate evolution of the US Air Force’s Thor missile, which first flew in 1957 and stood watch ...

hence the vehicle was called the Thor-Delta.) Related: Meet the Delta Rocket Family of the United Launch Alliance Three months later, the Thor-Delta deployed Echo IA into orbit, leading to the ...

Delta IV Heavy, we're ready for your fiery − and final − show. The last launch ever for United Launch Alliance's powerful rocket is one you won't want to miss. The Delta IV Heavy rocket will ...