Oops? While most of Washington is appearing on the TV to warn that not letting American agencies collect vast quantities of data about everyday Americans is going to doom us all, it turns out that some of our more concrete protections against terrorism need a bit of work. An internal investigation of the Transportation Security Administration revealed security failures at dozens of the nation’s busiest airports, where undercover investigators were able to smuggle mock explosives or banned weapons through checkpoints in 95 percent of trials, ABC News has learned.