Air Force's F-22 back in service after 4-month grounding

The U.S. Air Force on Wednesday cleared its F-22 Raptor fleet to return to service following a four-month grounding over concerns that the jets' pilots weren't getting proper oxygen. Bases are cleared to start flying the fighter jets under a "return to flight" plan - with new rules including daily inspections of the life-support systems - that the Air Force announced earlier in the week, said Staff Sgt. Heidi Davis, spokeswoman for the Air Force's Air Combat Command.

See the full article at CNN