For the first time, the chairman of the independent commission investigating the Sept. 11 attacks is saying publicly that 9/11 could have and should have been prevented, reports CBS News Correspondent Randall Pinkston. “This is a very, very important part of history and we’ve got to tell it right,” said Thomas Kean. “As you read the report, you’re going to have a pretty clear idea what wasn’t done and what should have been done,” he said. “This was not something that had to happen.” Appointed by the Bush administration, Kean, a former Republican governor of New Jersey, is now pointing fingers inside the administration and laying blame. Full Story