what he s telling authorities today, monday, august 22nd, 2011. captions paid for by nbc-universal television and welcome to today on this monday morning. i m ann curry. i m carl quintanilla in for matt this morning. it is the dramatic and dynamic situation in tripoli today for this cautious optimism that moammar ga dffy s time in power could be ending soon. they ve been rejoicing in the streets throughout the night after ceasing control of most of the libyan capital. but they re now facing resistance from gadhafi loyalists near his compound. they have taken two of his sons into custody. this morning the exact whereabouts of the libyan leader himself are unclear. president obama is keeping an eye on the situation from martha s vineyard. he issued a statement saying the battle is at a tipping point, they need to recognize their rule has come to an end. let s get right to nbc s chief correspondent richard engel. richard, what s the latest. reporter: tiply is fallin