The Northrop Grumman B-2 Spirit is an American heavy strategic bomber, featuring low observable stealth technology designed for penetrating dense anti-aircraft defenses. It is capable of all-altitude attack missions up to 50,000 feet, with a range of more than 6,
From Wikipedia
The Northrop B-2 Spirit is an American nuclear-capable subsonic stealth strategic bomber, often referred to as a "stealth bomber", solely operated by the United States Air Force. A four-engined flying wing and lambda wing with a crew of two to three, it is designed with stealth technology to penetrate sophisticated air defenses.