sergeant frank wuterich would lead a convoy, escorting a fresh unit of iraqi soldiers to a nearby checkpointnd bringing food to fellow marines. >> staff sergeant wuterich and his squad re-supplied us that morning, probably about 6:30 or 7:00 or so. i remember a couple of my friends were with... were in the same squad, so i was talking to them. my squad was on post at the time. they were getting ready to come off post. it was early in the morning. everybody was tired, just talking to them. and then... then they ended up leaving. >> narrator: sergeant wuterich was in charge of four vehicles and 11 marines. among them were lance corporals miguel terrazas, justin sharratt and stephen tatum; corporals sanick dela cruz and hector salinas; and private first class humberto mendoza. at about 7:00 a.m., as they drove west, a terrific explosion rocked wuterich's convoy. justin sharratt was in the lead vehicleÇhz >> i heard a large explosion from behind me. i turned around to, you know assess what happened. i remember seeing the second humvee and the third humvee. i remember calling that out. and then i