The 1952 Washington DC UFO incident lasted from July 12 to July 29. In that year, the 29th, the last day, was the 211th day of the year, which is the 47th prime. Again, the entire USA UFO phenomenon connects back to the number 47, with the outbreak of sightings starting in 1947, on the 47th Parallel North, just before Roswell, in 1947, in the 47th state.

UFOs=47
*Rainier=47
Government=47 & 52
Authority=47 & 52
President=47 & 52
White House=47 & 52
Republican=47 & 52
Democrat=47
DC=47