US forces used napalm-like MK-77 firebombs against Iraqi forces in their drive toward Baghdad last spring, a Pentagon official confirmed today, defending their use as legal and necessary. US Marine Corps jets dropped the firebombs at least once in March to take out Iraqi positions at the town of Safwan just across the Kuwait border from the US-led invasion force, the official said, speaking on condition of anonymity. "It is like this: you've got (an) enemy that's hard to get at. And it will save your own lives to use it, and there is no international contraventions against it," the...