Most Expensive Military Aircraft

The Northrop Grumman B-2 Spirit is an American heavy bomber with “low observable” stealth technology designed to penetrate dense anti-aircraft defenses and deploy both conventional and nuclear weapons.  Only 21 units were made and now only 20 reamins as one crashed in 2008. The B-2 Spirit is the most expensive military aircraft and each unit cost around $2.4 billion.