Smaller oil containment box lowered into the Gulf
A second, smaller oil containment box was lowered into the sea near the blown-out well in the Gulf of Mexico.
The box was being slowly submerged to the seabed, but it won't be placed over the spewing well right away.
BP says engineers want to make sure everything is configured correctly and avoid the same buildup of ice crystals that stymied their first attempt at using a larger box that was about 100 tons.
Undersea robots will position the box over the gusher by Thursday.