The Air Force Research Laboratory is looking for concepts for a resuable launch vehicle using an expendable upper stage on a reusable first stage.
COMMENT: This has been tried several times and always killed for budgetary reasons. I hope there's some real uniformed and DoD authority behind this and it might go somewhere. Will it survive the budget wars? All resuable ideas since the 1950s have failed that test at the subscale demonstrator phase or before. Here's hoping this will break the jinx.