America's bomber force is only a tiny, tiny shadow of what it used to be. Our most numerous bomber is the B-52. Lets look at the numbers:
There were 744 B-52's built originally, in several series: B-52A (testers) 3. B-52B, 50. B-52C, 35. B-52D, 170. B-52E, 100. B-52F, 89. B-52G, 193. B-52H, 102.
While all these weren't in service at the same time, most of them were. The only B-52's left in service now are 76 B-52H's. All the rest have been either chopped into scrap or otherwise demilitarized and what is left of the aircraft are displayed in museums.
We also had the B-47, built before the B-52. We had 2,032 of them made.
We had the B-58 Hustler, with 116 of them made.
We had the B-36, with 384 of them made.
For a long time, during the Cold War, the majority of all these were in service at the same time, along with a chunk of the 370 B-50's and a smattering of B-29's, although the latter 2 were no longer used much as combat bombers but as tankers and trainers and weather aircraft.
Think of that, 3,276 jet (and mix jet and prop-jet) bombers built and flying in a 20 year period, most of them available for nuke bomb dropping if called upon.
THAT is deterrence!
Here in 2013, we have 76 50 year old B-52's, 66 B-1's and 20 B-2's.