s ve lost their homes, their family, their friends. i feel like i would like to use this experience to bring and raise awareness to nepal and the tragedy that has happened here to all these people. >> that's all for this edition of "dateline." i'm lester holt. thanks for joining us. thanks for joining us. this sunday, the new front-runner in iowa. ben carson surges ahead of the pack, shocking the pundits and getting under donald trump's skin. >> i'm presbyterian. i mean, seventh day adventist, i don't know about. >> my sit-down with ben carson, who isn't holding back. >> if people canme up with a reasonable explanation of why they would like to kill a baby, i'll listen. >>>>>plus, did republicans fumble their moment at that benghazi hearing. >> i don't know what y'all were doing thursday. i had a rough thursday. [ laughter ] >> we'll talk to the leading figures on that committee, republican trey gowdy and >>> and clinton'sig week. the democratic debate won, joe biden, out, the benghazi hearing over. the ten days that may have vaulted hillary clinton to the democratic nomination. >> it's been quite a week, hasn't it? >>> and joining me