Cruickshank : Track record of al Qaeda-inspired extremists targeting soldiers . The U.S. military has been tracking the activities and affiliations of suspected terrorists since before 9/11. Security services looking at whether London suspects linked to any groups . Leading al Qaeda clerics have called those who target western soldiers 'heroes '
Cruickshank : Track record of al Qaeda-inspired extremists targeting soldiers . British police uncovered 2007 plot to kidnap and murder a Muslim British soldier . Security services looking at whether London suspects linked to any groups . Leading al Qaeda clerics have called those who target western soldiers 'heroes '