this, this will turbo-charge their popularity in the global jihadi movement. isis is not thought to have the capability to get devices necessarily past security scanners. but what we're hearing from barbara's reporting is u.s. intelligence agencies believe it was either an insider at the airport or somehow lax security at the airport. that brings into play the group on the ground. that is the isis sinai affiliate. and one of the reasons why it's being perhaps so coy in its statement about the attack, saying you're going to need to figure out how we did this, is because they did have an insider somehow at the airport and they don't want to reveal the fact they may have some kind of mole at sharm el-sheikh airport. it may explain why the statements have so little detail in the last couple of days. >> i have so much more. this is massive. this would be, as you point out, the biggest terrorist attack since 9/11 as isis is now apparently claiming responsibility and u.s. intelligence suggesting that indeed that would be the case.