I am actually surprised that it took so long and totally predictable.
You have thousands of people lining up outside the airport right next to Western troops and so it is very easy for a suicide bomber or two to get right up next to them and detonate their bombs without arising any suspicion beforehand.
You have thousands of people lining up outside the airport right next to Western troops and so it is very easy for a suicide bomber or two to get right up next to them and detonate their bombs without arising any suspicion beforehand.