certainly. remember, they are still the ones who claim the attacks against the "charlie hebdo" magazine in paris early on this year. now it seems isis wants to be in the game too, so to speak. claiming this isn't the same as having necessarily done it but it shows that extremists are finding more of a food foot hold in yemen because the government is in tatters. >> if there's anything extremists like in terms of being able to incubate, it's chaos, and that certainly is what it looks like in the region you're reporting on. nick payton walsh, thank you so much. he'll continue to update us throughout the day. elsewhere, tunisia, it's independence day. but this year's observance is equal parts pride and equal parts anger and grief over what happened on wednesday. the horrifying massacre at the bardo museum. security officials say two gunmen who were among 23 people killed that day had been trained