There are currently 60-63 B-1 Lancers active in the USAF.
100
I believe about 65 are still operational, with some 20 'mothballed'.
Are you talking about the B-1 Lancer? Those are airship bombers
3 u.s bombers disapeared during world war 2
B52 B1B B17 B24
None. Dedicated bombers are exclusively the domain of the Air Force. Fighter/Bombers and attack aircraft can be found in the Air Force, Navy, and Marines. The US Army has no such aircraft.
74 with 20 in reserve.
7,377 Lancaster bombers were built.
At the height of the Luftwaffe's power they had about 2,800 bombers. Almost all of these were what the Allies would class as 'light bombers'.
how many aircraft carrier does the usa have
The Japanese Bombers bombed many ships like the West Virginia, Arizona...
There are many single engine aircraft used as dive bombers and torpedo bombers that could be cited if this were the aim of the question - was it?
two