reporter: we can t be certain we won t be back here. no. you never can be certain that you won t be back. reporter: but the general says whatever happens in afghanistan, those who served should be proud of what they have accomplished. linsey? martha, thank you. now to former attorney general william barr, what he s now saying about former president trump s claims of election fraud and what it was leik inside that explosive meeting when the former president confronted his a.g. here s abc s chief washington correspondent jonathan karl. reporter: bill barr was seen as one of trump s most loyal cabinet secretaries. but in a series of exclusive interviews, he tells me donald trump s claims of election fraud are b.s. if i found something, you know, i had no motive to suppress it. but my suspicion all the way along was that there was nothing there. it was all [ bleep ]. reporter: barr told me he had conducted his own informal inquiry. even talking to cyber security experts a
about allegations that voting machines were rigged. they found nothing. you can tell me all you want to about, you know, how this could have been hacked or whatever. but it s a counting machine. so you just reconcile the two. there s a pile right there. how many ballots? 1,000. now, let s see who they re for. there s been no discrepancy reported anywhere. reporter: barr was urged to speak up by then senate majority leader mitch mcconnell, who was worried about maintaining republican control of the senate. mcconnell said barr was the only person who could, quote, inject some reality into trump. on december 1st, barr publicly declared there was no evidence of widespread fraud. multiple sources who witnessed the president s reaction told me they had never seen him so angry. one said, he had the eyes and mannerisms of a madman. how the expletive could you do this to me? why did you say it? trump demanded. because it s true, barr replied. you must hate trump, the president respo
the new heat wave now building in the northeast. and as we come on the air tonight, tropical storm danny making landfall in south carolina. rob marciano tracking it all for us. news tonight about the pandemic. a new study finds the pfizer and moderna vaccines may offer protection for years, even before antibodies start to fade. the highly con stay use delta variant spreading across the states and threadening thousands of unvaccinated americans. overseas tonight, president biden ordering a second round of air strikes on iranian-backed militias. martha raddatz just back from the region. her exclusive interview with the american commander overseeing the u.s. military withdrawal from afghanistan as the taliban gains ground. former attorney general bill barr blasting former president trump s false claims of widespread election fraud. barr, in the bluntest way possible, telling jonathan karl none of it was true. news tonight about the tourist shot in new york city s times square. how