"The Flight 253 attack was the 28th foiled terror plot against the United States since 9/11. What is notable is that of the 28 failed plots, 26 were stopped by intelligence, military, and law enforcement agencies. Only two were stopped by citizens on the scene - Umar Farouk Abdulmutallab in 2009, and Richard Reid in 2001. In both these cases, America just got lucky - the plots were clumsy and the passengers and crew responded bravely and quickly. There are many valuable lessons to be learned from the failed Christmas attack on a Detroit-bound airliner; throwing more money at airline security is not one of them."