he was 22-year-old yousef zagba, a moroccan italian. he was no stranger to law-enforcement.taly confirmed today that szaga was briefly detained after trying to reach the so-called islamic state, and the italians say they informed british authorities. as the investigation moves forward, and entire country stopped today to remember the seven people who lost their lives saturday night. >> a gloomy silence falls over londonon. for exactly one minute, britain is frozen in stillness. shortly after, police release another alleged attacker's name, youssef zaghba, identified as a moroccan italian, believed to have been on the police radar.the other two have been identified as a libyan moroccan and a british citizen born in pakistan. one of them was known to authorities. last year, he featured in this tv documentary, the j ihadis next-door, about islam is extremists -- islamist extremists. two others from his community tried to report him. one woman claims he tried to radicalize her children. these claims have left people angry and concerned. british prime minister theresa may is unde

he's believed to be 22-year-old yousef zagba from east london, believed to be an italian national of moroccan descent, not known to british authorities. italian media giving us details saying he was actually stopped by police at ba loan yeah airport about a year ago on his way to turkey, possibly syria, charged with international terrorism according to italian media reports, but those charges were later dropped. the other one, kur ram shazad butt was known not only to police and domestic intelligence services but also featured in a television documentary about islamist jihadist extremists that aired about a year ago. not much known about the third attacker, rachid redouane, 30 years old, claimed to be of both libyan and moroccan descent. a lot of tough questions to be asked to the authorities of why yet again another terrorist attack, the individuals knew of this individual, why they weren't able to prevent this attack from happening in the first place. >> lucy kafanov, thank you. >>> day two of the bill cosby sexual assault trial. he arrived with a familiar face by his side, actress

. >> reporter: the third attacker identified this morning, his name is yousef zagba well known to authorities because he tried to go to syria to join isis. >> all right, and then a lot of people are asking what about extremists who are living here in the united states on the radar known to authorities? >> reporter: well, the fbi says it has active investigations in all 50 states, but a lot fewer people who are considered active threats than in great britain. they have 23,000 people they're trying to keep tabs on. >> wow, all right, brian, thank you. >> complicated problem right there. >>> president trump is facing new fallout from his tweets targeting london's mayor over the terror attack and his other tweets about the travel ban. they could cripple the ban as it heads to the supreme court. the president trying to move his agenda forward focusing on infrastructure and talk health care and taxes with congressional leaders today and now know he will not use executive privilege to block fired fbi director james comey from testifying on capitol hill thursday. we'll start there with our chief whit