The whole case report:
Sept. 20, 1952; At sea on USS Franklin D. Roosevelt (BB)
At a few minutes after 4 p.m., personnel of the U.S.S. Franklin D. Roosevelt, an aircraft carrier participating in the Mainbrace maneuvers, observed a silvery, spherical object which was also photographed. (The pictures have never been made public). The UFO was seen moving across the sky behind the fleet. Reporter Wallace Litwin took a series of color photographs, which were examined by Navy Intelligence officers. The weather man aboard said a balloon was launched at 3:30 p.m. and it rose up and out of sight in the overcast in about 50 seconds.
Thanks to information from Martin Shough we have been able to obtain clarifications. Actually the 3-4 photos were taken by the reporter onboard. The reporter later said the object looked like a white ping-pong ball. A letter from the photographer to researcher Ole Henningsen is provided below and in it he claims that it was not a weather balloon. As Martin pointed out there is no evidence in the photo of any radar reflector. Litwin also reported that the FDR was carrying an atomic bomb. Additional documents were just obtained from Brad Sparks and have been added to the dir reports below. For the record, Dan Wilson found the name Wallace Litwin in the article by Richard Hall. * Litwin was also mentioned in NICAP’s UFO Evidence, page 162. The date was given as September 20, 1952 on the PROJECT 10073 RECORD CARD, and three other BB docs.**
Capt. Edward J. Ruppelt:
In late September 1952 the NATO naval forces had held maneuvers off the coast of Europe; they were called Operation Mainbrace. Before they had started someone in the Pentagon had half seriously mentioned that Naval Intelligence should keep an eye open for UFO’s, but no one really expected the UFO’s to show up. Nevertheless, once again the UFO’s were their old unpredictable selves – they were there.”
20 September 1952 Operation Mainbrace UFO photo (nicap.org)