Elite special forces troops being dropped behind enemy lines on covert missions are to ditch their traditional parachutes in favour of strap-on stealth wings. The lightweight carbon fibre mono-wings will allow them to jump from high altitudes and then glide 120 miles or more before landing - making them almost impossible to spot, as their aircraft can avoid flying anywhere near the target. The technology was demonstrated in spectacular fashion three years ago when Austrian daredevil Felix Baumgartner - a pioneer of freefall gliding - famously 'flew' across the English Channel, leaping out of an aircraft 30,000ft above Dover and...