Probably testing the newest modern tech systems. SILO based ICBM missiles are passe and the military knows it. Some bombers are still effective at 35,000 feet, but our real deterrent lies deep in the seas where no one knows where they are.
They are called Trident submarines with multiple targeted warheads on 24 ICBM's. They let me sleep at night. The bad players know we have more than one out there and when deep enough, satellites can't track them. Think of the devastation of just one Trident sub. It could kill an entire nation. Want to use the Defense budget more efficiently? Build more Tridents along with state of art support attack subs.
I don't want our kids in any more useless ground wars or nation building. Let Venezuela kill themselves in their civil war. I don't care. Whoever wins with China or Russian support, let Venezuela or others attempt to attack us and find what is deep off their coast!