EE WAS AT THE EXPLOSIVES MAGAZINE. HE WAS TRYING TO OPEN A JAMMED DOOR (THE WOOD ON THE BACK OF THE DOOR EXPANDED DUE TO MOISTURE). HE STRAINED HIS LOWER BACK. HE REPORTED THE INCIDENT BUT DID NOT SEEK TREATMENT. ON 5/22 HE WAS BARRING ORE IN THE CRUSHER PIT AND REINJURED HIS BACK. HE IS NOW BEING TREATED BY A CHIROPRACTOR & MAY BE SCHEDULED FOR FURTHER MEDICAL TREATMENT.