Photo: An Aerial View

Aboard a Mississippi National Guard reconnaissance flight, Tulane toxicologist LuAnn White, right, talks with 1st Lt. David E. Leiva, a Tulane alumnus. White is one of several scientists to take the three-hour flight to the Deepwater Horizon oil rig site, also passing over Louisiana and the Mississippi barrier islands. (Photo by Casey Ware)

Aboard a Mississippi National Guard reconnaissance flight, Tulane toxicologist LuAnn White, right, talks with 1st Lt. David E. Leiva, a Tulane alumnus. White is one of several scientists to take the three-hour flight to the Deepwater Horizon oil rig site, also passing over Louisiana and the Mississippi barrier islands. (Photo by Casey Ware)