LINCOLN, ENGLAND - FEBRUARY 29:  The Secretary of State for Defence, Philip Hammond, visits RAF Waddington, on February 29, 2012 in Lincoln, England.  Pilots from the Royal Air Force and Royal Navy are taking part in an Olympic 2012 air security training exercise today in Lincolnshire. Codenamed 'Taurus Mountain 2', the exercise will involve more than 13,000 servicemen and women and will test air defences and air missile systems prior to the 2012 London Olympic Games.  (Photo by Bethany Clarke/Getty Images)