It looks like things are coming to a climax in Libya.

Col. Muammar el-Qaddafi’s four-decade-old grip on power dissolved with astonishing speed on Monday as rebels marched into the capital and arrested two of his sons, while residents raucously celebrated the prospective end of his four-decade-old rule. Colonel Qaddafi’s precise whereabouts remained unknown.

In the city’s central Green Square, the site of many manufactured rallies in support of Colonel Qaddafi, jubilant Libyans tore down posters of him and stomped on them. The rebel leadership announced that the elite presidential guard protecting the Libyan leader had surrendered and that their forces controlled many parts of the city, but not Colonel Qaddafi’s leadership compound.

The National Transitional Council, the rebel governing body, issued a mass text message saying: “We congratulate the Libyan people for the fall of Muammar Qaddafi and call on the Libyan people to go into the street to protect the public property. Long live free Libya.”

Officials loyal to Colonel Qaddafi insisted that the fight was not over, and there were clashes between rebels and government troops early on Monday morning.

The White House released a statement saying that the “regime has reached a tipping point.”

Meanwhile, the United States has recognized the Transitional National Council as the legitimate governing authority in Libya. At this pivotal and historic time, the TNC should continue to demonstrate the leadership that is necessary to steer the country through a transition by respecting the rights of the people of Libya, avoiding civilian casualties, protecting the institutions of the Libyan state, and pursuing a transition to democracy that is just and inclusive for all of the people of Libya. A season of conflict must lead to one of peace.

The only thing that is troublesome is that there doesn’t seem to be much knowledge of who’s actually in charge of the TNC.

On the good news front, this whole thing happened without one American casualty.