Four unarmed bombs were dropped by two US fighter jets in Australia's World Heritage listed Great Barrier Reef marine park after a training exercise went wrong. Any damage that could have been caused is unknown.
The Pentagon has grounded its entire F-35 jet fighter fleet, citing engine problems. The problem has been identified as a cracked engine blade, detected during a routine inspection at Edwards Air Force Base in California.
Red Team vs Blue Team, its fighter pilot training exercises again at Nellis Air Force base in Las Vegas. Starting in 1975, it is the worlds largest most comprehensive training available for US and invited pilots from around the world.