The US Air Force's plan to upgrade its 70-year-old B-52 bombers is billions over budget, watchdog finds

Source: Business Insider

The US has about 76 B-52s in its fleet. US Air Force photo by Airman Ben SelchowThe US Air Force's B-52 bomber upgrades are delayed and over budget by billions of dollars. The B-52 Stratofortress has been flying since 1950, and the Air Force hopes to keep it around into the 2050s.