>> we turn to the increasingly desperate situation in the philippines in the hard hit city of tacloban. they are pleading for help, asking, begging for food and water and medicine. all of those things scarce today. the u.s. military's mobilizing to help deploying the aircraft carrier u sss washington which expected to arrive thursday. the general in charge of the u.s. relief operation says of course time is of the essence. >> i need the rest of the world, international donor community to get mobilized to help the philippinos in their hour of need. a week from now will be too late. >> ian williams joins us by phone. we know each day brings a more desperate situation here. let's talk about the effort on the ground. the roads are blocked and difficulties and challenges. how are these relief workers