Instead, there were two battery failures when the entire 787 fleet had clocked less than 52, 000 flight hours.

NPR: NTSB Probes Safety Testing Of Boeing 787 Batteries

The B-52 took to the skies Tuesday, but no other information about the test flight was available, John Haire, a spokesman for Edwards Air Force Base in California, said in an email.

MSN: Hypersonic aircraft taken out for a trial run on B-52 bomber