B-2 Spirit | |
---|---|
A USAF B-2 Spirit in flight | |
Role | Stealth bomber |
National origin | United States |
Manufacturer | Northrop Corporation Northrop Grumman |
First flight | 17 July 1989 |
Introduction | April 1997 |
Status | Active service: 20 aircraft |
Primary user | United States Air Force |
Number built | 21[1][2] |
Program cost | US$44.75 billion (projected through 2004)[3] |
Unit cost | $737 million (1997 cost for each aircraft only, $1.01 billion today)[3][4] |
Tuesday, February 1, 2011
World Best War Machines
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