[ceejayoz]

ULA is planning that (with a helicopter) to catch the engines from their upcoming Vulcan rocket. https://spaceflightnow.com/2015/04/14/ula-chief-explains-reu...

[woodandsteel]

That was the original plan. But according to https://en.wikipedia.org/wiki/Vulcan_Centaur they went ahead without funding it, though they may some time in the future. So for now Vulcan is going to have a disposable first stage, just like all the other old-time space rockets.