>> glor: good evening. for so many people on the gulf, the fourth of july weekend is hardly a holiday. on day 75, here is the latest: a ship described as the world's largest oil skimmer is now in the gulf. the new admiral in charge toured the oil spill by air, and a few gulf areas have been reopened to fishing. mark strassmann is in grand isle, louisiana, tonight. mark? >> reporter: on the summer's busiest holiday weekend, beaches like this one ought to be packed, but take a look. there's been nobody around all day, hazmat suits instead of bathing suits on a changed gulf coast. >> ta...