NATO has intensified its air campaign against the Gaddafi regime in Libya amidst ongoing clashes on the ground. On Wednesday, NATO warplanes flew around 200 missions in Libyan airspace after rebel leaders accused international forces of failing to protect the city of Misurata. The United States has said that success has been slowed in part by the Gaddafi regime’s use of human shields near military positions. Rebel fighters, meanwhile, have reportedly made advances in fighting near the key oil port of Brega. Both sides have accused the other of bombing Libya’s oilfields. Gaddafi’s forces have attacked oil sites in rebel-held areas after the rebels brokered deals to raise funds for their operations. Libya is accusing British warplanes of bombing a key oilfield and killing a number of workers.