Faced with the potential of mass atrocities and a call for help from the Libyan people, the United States and our friends and allies stopped Gadhafi's forces in their tracks. A coalition that included the United States, NATO and Arab nations persevered to protect Libyan civilians. So this is a momentous day in the history of Libya. The dark shadow of tyranny has been lifted, and with this enormous promise the Libyan people now have a great responsibility: to build an inclusive and tolerant and democratic Libya that stands as the ultimate rebuke to Gadhafi's dictatorship.