Fighting has intensified in Libya as troops loyal to Col. Muammar Gaddafi have launched a massive counter-offensive against a number of rebel-held towns. The BBC reports Libyan government forces are advancing toward the oil port of Ras Lanuf armed with tanks, artillery, military jets and helicopters. The town of Bin Jawad, 30 miles from Ras Lanuf, has already fallen to forces loyal to Gaddafi. The United Nations estimates almost 200,000 people have now fled the violence in Libya. Earlier today, the United Nations called for $160 million to cover the needs of those who have fled Libya, as well as others who remained trapped in the country.