The first B-2 was publicly displayed on Nov. The B-2 has a crew of two pilots, a pilot in the left seat and mission commander in the right, compared to the B-1B's crew of four and the B-52's crew of five. Many aspects of the low-observability process remain classified however, the B-2's composite materials, special coatings and flying-wing design all contribute to its "stealthiness." These signatures make it difficult for the sophisticated defensive systems to detect, track and engage the B-2. The B-2's low observability is derived from a combination of reduced infrared, acoustic, electromagnetic, visual and radar signatures. Its unrefueled range is approximately 6,000 nautical miles (9,600 kilometers). Its low-observability provides it greater freedom of action at high altitudes, thus increasing its range and a better field of view for the aircraft's sensors. The revolutionary blending of low-observable technologies with high aerodynamic efficiency and large payload gives the B-2 important advantages over existing bombers. Its capability to penetrate air defenses and threaten effective retaliation provides a strong, effective deterrent and combat force well into the 21st century. Its low-observable, or "stealth," characteristics give it the unique ability to penetrate an enemy's most sophisticated defenses and threaten its most valued, and heavily defended, targets. The B-2 provides the penetrating flexibility and effectiveness inherent in manned bombers. The B-2 brings massive firepower to bear, in a short time, anywhere on the globe through previously impenetrable defenses. A dramatic leap forward in technology, the bomber represents a major milestone in the U.S. The B-2 Spirit is a multi-role bomber capable of delivering both conventional and nuclear munitions.
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