The aerial refueling aircraft used in Operation Epic Fury were created from a single $16 million Boeing prototype. See the 'Dash 80.'

Boeing's $16 million bet led to the creation of the 707 jetliner and the Air Force's KC-135 tanker. Here's the fascinating history of the "Dash 80." ...
Aviation Week

BOEING BUSINESS JETS DELIVERS BBJ TO SOUTH AFRICAN AIR FORCE

Boeing Business Jets delivered a Boeing Business Jet (BBJ) to the South African Air Force last week. The jet, purchased by the Armaments Corporation of South Africa, Ltd. on behalf of the military, ...