‘Is that a UFO?’ or ‘That surely is not a plane!’ are the words coming out of almost everyone when the B-2 flew past them. Although the B-2 was not a UFO, it could disappear like one in a blink of an eye. A plane, so unmatched and different that people still do date are seen scratching their heads when they see one. US’s most formidable and mysterious of weapons is the sole best-known stealth aircraft in the world, capable of dropping both conventional and nuclear payloads.