the LM's reaction control system (RCS) thrusters, for 21.5 seconds. The SM was jettisoned less than half an hour later, allowing the crew to see the damage for the first time, and photograph it. They reported that an entire panel was missing from the SM's exterior, the fuel cells above the oxygen tank shelf were tilted, that the high-gain antenna was damaged, and there was a considerable amount of debris elsewhere. Haise could see possible damage to the SM's engine bell, validating Kranz's decision not to use the SPS. The last problem to be solved was how to separate the lunar module a safe distance away from the command module just before reentry. The normal procedure, in lunar orbit, was to release the LM and then use the service module's RCS to pull the CSM away, but by this point, the SM had already been released. Grumman, manufacturer of the LM, assigned a team of University of Toronto engineers, led by senior scientist Bernard Etkin, to solve the problem of how much air pressure to use to push the modules apart. The astronauts applied the solution, which was successful. The LM reentered Earth's atmosphere and was destroyed, the remaining pieces falling in the deep ocean. Apollo 13's final midcourse correction had addressed the concerns of the Atomic Energy Commission, which wanted the cask containing the plutonium oxide intended for the SNAP-27 RTG to land in a safe place. The impact point was over the Tonga Trench in the Pacific, one of its deepest points, and the cask sank to the bottom. Later helicopter surveys found no radioactive leakage. Ionization of the air around the command module during reentry would typically cause a four-minute communications blackout. Apollo 13's shallow reentry path lengthened this to six minutes, longer than had been expected; controllers feared that the CM's heat shield had failed. Odyssey regained radio contact and splashed down safely in the South Pacific Ocean, , southeast of American Samoa and from the recovery ship, USS Iwo Jima. Although fatigued, the crew was in good condition except for Haise, who had developed a serious urinary tract infection because of insufficient water intake. The crew stayed overnight on the ship and flew to Pago Pago, American Samoa, the next day. They flew to Hawaii, where President Richard Nixon awarded them the Presidential Medal of Freedom, the highest civilian honor. They stayed overnight, and then