After months of rebel uprisings and NATO air assaults on Col. Muammar el-Qaddafi's regime in Libya, rebel forces reached a major breakthrough this weekend. Advancing to just seventeen miles outside Tripoli, the rebels pushed through the city's outer defense lines, flooded into the capital and battled with Col. Muammar el-Qaddafi loyalists last night. The rebels captured two of Gadhafi's sons, including Seif al-Islam, the assumed heir-apparent, and civilians celebrated in the streets over what may be the end of Quaddafi's 42 years in power of Libya. Does this spell the end for him? Dirk Vandewalle is a Dartmouth professor and Libya expert. He joins us from New Hampshire. Ibrahim Dabbashi, Libya's deputy ambassador to the United Nations, also joins us.