It is lessons learned from the Iraq war. First of all, we must be self-sufficient. No more the 4th Division stuck off of Turkey, no more worries about overflights. Second, we need something to knock out underground bunkers in a non-nuclear fashion. The solution: we base weapons in space. Also, we are not putting nuclear weapons in orbit - we simply direct the titanium rods down from space and let gravity and physics do the trick - problem solved with no fallout and no need to consult allies.