As the interim week came to a close, UFOs were still much on the minds of the people and the military. Ruppelt wrote that on the same night as the second round of the Washington Nationals began, Blue Book received a really good report from California. An ADC [Air Defense Command] radar had picked up an unidentified target and an F-94C had been scrambled. The radar vectored the jet interceptor into the target, the radar operator in the '94 locked on to it, and as the airplane closed in the pilot and RO [radar operator] saw that they were headed directly toward a large, yellowish-orange light. For several minutes they played tag with the UFO. Both the radar on the ground and the radar in the F-94 showed that as soon as the airplane would get almost within gunnery range of the UFO it would suddenly pull away at a terrific speed. Then in a minute or two it would slow down enough to let the F-94 catch it again.
Ruppelt did interview the pilot himself over the telephone. The pilot told Ruppelt that he felt as if they were involved in a big aerial game of cat and mouse with the strange object. The pilot said that he hadn't liked it and was afraid that at any moment, the cat would pounce, possibly destroying his aircraft in the process.
Ruppelt noted in his book, "Needless to say, this was an unknown."
As the California fighter pilot was chasing his single UFO, the formations of strange lights had returned to Washington National. Focus changed as Air Force personnel, including a Naval radar expert assigned to assist them, watched the UFOs dance through the skies over the nation's capital from inside the radar room at Washington National. Before long, everyone, including President Truman, was demanding answers
Source: WASHINGTON INVASION, Page 67.