CNN The Situation Room March 23, 2015 22:03:00
>> reporter: the remaining u.s. tools, drone strikes and monitoring cell phones and social media. >> it's true that that coordination would be more effective if there were u.s. personnel in the country. >> reporter: the number one u.s. target? al qaeda's master bomb maker. he knows how to make bombs with difficult to detect explosives a major threat to aviation. he was tied to the so-called under wear bomb attack in 2009. the newest threat? the isis branch in yemen which claimed responsibility for these mosque attacks killing and injuring hundreds. isis releasing photos of the attackers. their...