NEW : BP doctor says up to 1,500 cleanup workers sickened . NEW : Their arrival is being delayed because of rough weather , said Stephanie Hebert , spokeswoman for the cleanup effort . BP official admits that the oil spill is worse than first thought. Saturday is new target for linking surface vessel to ruptured well . Rough weather continues to be a challenge in cleanup .
NEW : BP doctor says up to 1,500 cleanup workers sickened . NEW : BP official admits that the oil spill is worse than first thought. Saturday is new target for linking surface vessel to ruptured well . Rough weather continues to be a challenge in cleanup .