Video: Suicide bomber kills nearly 100 in Yemen

Officials have said the attack is likely the work of al-Qaida. The terrorist network has grown in Yemen because the country hasn?t had an effective government for an entire year. NBC?s Richard Engel reports.

>>> over seas a horrifying attack today in a place so many experts have been saying for so many years represents the next big threat to the united states . our chief foreign correspondent richard engel reports on one of the most violent days in a long time in yemen .

>> reporter: the suicide bomber was disguised as a soldier. he tucked into a crowd at a rehearsal for a military parade , detonated a bomb and killed nearly a hundred people. yemen 's defense minister narrowly escaped with his life. officials say it's likely the work of al qaeda in yemen . while the u.s. has decimated al qaeda elsewhere, the militant group has grown in yemen because the country hasn't had an effective government for a year. but the arab spring finally toppled the old president and the new president is trying to re-establish order and crack down on al qaeda . u.s. military officials tell nbc news the new president has dramatically increased government-sanctioned u.s. drone attacks in yemen and american counterterrorism training. al qaeda clearly doesn't want to be driven out. experts say al qaeda is fighting to make yemen its new safe haven. this yemeni bomb maker is one of the world's most wanted terrorists. accused by u.s. officials of plotting last month to put a so-called underwear bomb on an american-bound flight. the united states , brian, spent the last ten years and billions of dollars and thousands of lives to dislodge al qaeda from pakistan and afghanistan. now yemen has become the latest front and they aren't v leaving without a fight. brian?

martin luther king jr. zappos john elway john elway i have a dream speech fox news debate martin luther king jr