[img]http://d.yimg.com/a/p/ap/20100506/capt.714677a0c02c49eeac7ead9ebce145bd-714677a0c02c49eeac7ead9ebce145bd-0.jpg?x=130&y=86&q=85&sig=DMx9rBvVfwtMmKTDCIoOMQ--[/img]AP - Workers were ready to lower a giant concrete-and-steel box over the blown-out oil well at the bottom of the sea Thursday in a risky and untested bid to capture most of the gushing crude and avert a wider environmental disaster.