A neurologist performs an optalmologic t

A neurologist performs an optalmologic test on a Philippine Coast Guard diver, who was flown out from the site of the sunken Princess of the Stars ferry in Sibuyan, during medical examinations at the East Avenue hospital in suburban Quezon city in Manila on June 28, 2008. Philippine officials on June 27 suspended recovery operations at a sunken ferry containing hundreds of dead bodies after learning it was carrying large amounts of highly toxic pesticide. The health department identified the chemical as endosulfan, a restricted pesticide. Health Secretary Francisco Duque ordered the divers to be tested as a precaution. "There are now efforts to assess exposures of divers and possible illness in case there was endosulfan exposure," Duque added. AFP PHOTO/JES AZNAR (Photo credit should read JES AZNAR/AFP via Getty Images)