>> we get different stories of what happened. we have some stories that said that our soldiers engaged in the battle, that pursued them. we have others that said no, they attacked us. we have to find out what happened. >> the ambush began after a meeting between an american special ops teams and tribal elders went longer than expected. officials traveled near the border with mali to accompany three dozen troops to meet the local leaders. on capitol hill, there's calls for a separate congressional investigation. over the weekend, lawmakers say they'd didn't know there were 1,000 troops in niger and the surrounding area. >> senator mccain is frustrated. we don't know where we're at in the world and what we're doing. >> we're in a brave new world. there's no set battle plans. you don't declare war and fight three weeks later. >> senator rand paul, a republican that leans libertarian tweeted you know