Exercise Hyperion Storm, a major training exercise, takes place ahead of the British military taking charge of NATO's special operations forces.Its deputy commander Colonel Phil O'Callaghan, a Royal Marine, watched the operation unfold.Royal Marine Commandos and Army Rangers, flown into position by RAF helicopter pilots, fast-roped from a Chinook during a mock attack on an enemy position at Otterburn training camp in Northumberland.

Exercise Hyperion Storm, a major training exercise, takes place ahead of the British military taking charge of NATO's special operations forces.Its deputy commander Colonel Phil O'Callaghan, a Royal Marine, watched the operation unfold.Royal Marine Commandos and Army Rangers, flown into position by RAF helicopter pilots, fast-roped from a Chinook during a mock attack on an enemy position at Otterburn training camp in Northumberland.