. >> topping it is terrorism, and we have several reports this morning, sonia gallego in london, but viviana hurtado with new security rules. >> designed to focus on those who pose the largest threat. >> reporter: at another sign at the nation's airports, travelers were delayed sunday evening for at least two hours at the airport after a man walked the wrong way in a security exit. >> the public just has no confidence anymore in the ability of government to provide a safe environment which avelers can fly. >> reporter: there will be extra screening for passengers with passports from or who have traveled from nations that the u.s. sees suspect such as yemen. the a additional screening also for those who fly from what the government decide are like tehran. >> i suspect they will broaden the definitions. >> reporter: but critics say these heightened security measures still won't detect the bomb materials such as sewn into the underwear of umar farouk abdulmutallab. the system failed but insists an obvious terror plot wasn't missed. >> there was no smoking gun if will you, that said that

sonia gallego is joining us from london with the latest. good morning, sonia. >> reporter: good morning, linsey and jeremy. the recent setup in security is intensifying as both the u.s. and british embassies in yemen remain closed for yet another day. they stay closed on sunday following warnings of an al qaeda attack. all local staff was sent home and the head of u.s. central command in the region, general david petraeus, visited the country over the weekend with a promise to look at ways to enhance military and intelligen cooperation with the yemeni government. the u.s. government has been rapidly increasing those efforts in aiding yemen's own military to hit at al qaeda targets in the country. these efforts have escalated since the failed christmas day bomb plot. the main suspect, a nigerian, umar farouk abdulmutallab, claimed to have intended to carry out the attack, as well as militants based in yemen. yemen itself is coming over increasing scrutiny over the weekend. president obama directly accused an offshoot of the al qaeda base as b