The B-2 bomber was so costly that Congress cut its initial 1987 purchase order from 132 to 21. (A 2008 crash leaves the current number at 20.) The B-2 is hard to detect via infrared, acoustic, electromagnetic, visual or radar signals. This stealth capability makes it able to attack enemy targets with less fear of retaliation. In use since 1993, the B-2 has been deployed to both Iraq and Afghanistan.
Cost:
about $2.4 billion
F-22 Raptor
F-22 Raptor is a stealth fighter aircraft made by the United States. It was originally envisioned as air superiority fighter for use against Soviet aircraft, but the aircraft is equipped for ground attack, electronic warfare and signals intelligence. This aircraft through a long development period, is named the prototype YF-22, three years before it was officially adopted F/A-22 named, and finally given the name of the F-22A when used on the official start in December 2005. Lockheed Martin Aeronautics is the prime contractor is responsible for the majority of the airframe, weapons, and assembling the F-22. Then his partner, Boeing Integrated Defense Systems provides the wings, avionics equipment, and pilot and maintenance training.
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