of species of physician and crustations. today on "studio b" we spoke to a scientist who threat the spill still poses. >> we initially didn't see any effect on the corals. we are starting to see so. indicator organisms disappear and i do off. >> shepard: director of a firm called ecorigs. he said that his group has noticed small fish, sponges, and grabs dying off. we have seen some controversy lately over whether the feds should let other nations help clean up this gulf oil spill. today the white house addressed the issue. but is the response enough to calm the critics? tonight, we'll report. you decide. plus, at least 16 people now confirmed dead and dozens more missing after a deadly flash flood swept through arkansas. tonight, a desperate search for survivors. and a look through the wreckage. tonight, the cube is filled with a brand new disaster and we'll