ASSOCIATED PRESS
Retired Coast Guard Adm. Thad Allen on Tuesday looks over a Conductivity-Temperature-Depth carousel, which is used to assist Deepwater Horizon oil spill response efforts by capturing subsurface water samples on the Gulf of Mexico near the coast of Louisiana.

ASSOCIATED PRESS Retired Coast Guard Adm. Thad Allen on Tuesday looks over a Conductivity-Temperature-Depth carousel, which is used to assist Deepwater Horizon oil spill response efforts by capturing subsurface water samples on the Gulf of Mexico near the coast of Louisiana.