Libyan Rebels Capture Major Oil Hub; Government Forces Repel Rebel Attacks in Other Cities; How Long Can Qaddafi Hang On?

``Nineteen days after it began with spirited demonstrations in the eastern city of Benghazi, the Libyan uprising has veered sharply from the pattern of relatively quick and nonviolent upheavals that ousted the leaders of Tunisia and Egypt. Instead, the rebellion here has become mired in a drawn-out ground campaign between two relatively unprofessional and loosely organized forces — the Libyan Army and the rebels — that is exacting high civilian casualties and appears likely to drag on for some time.''