1952: September 17th–30th UFO|UAP & Entity Sightings Archive The back half of September 1952 belongs to Operation Mainbrace, the large NATO naval exercise that filled the North Sea and northern Europe with ships and aircraft and produced some of the era's best-documented pilot and shipboard sightings. RAF Meteor pilot Flt. Lt. John Kilburn and a second pilot watched a silver disc follow them down over Topcliffe, Yorkshire, swing like a falling sycamore leaf, then streak away at incredible speed, while on the carrier USS Franklin D. Roosevelt a reporter photographed a silvery sphere that Navy Intelligence examined and never released. Away from the exercise, Blue Book files add a Killeen, Texas sentry's green object with two red flames, a woman's photograph at Little Rock that the Air Force called a double exposure, five bluish-gray lights over Chickasaw, Alabama, silver spheres hovering over Offutt AFB and a seven-person phone-in at Hearne, Texas. This page covers September 17th through 30th; see the companion page for September 1st–16th and the West Virginia entity encounters.#LittleRockArkansas #1952 #ufo #uap #ufosightings - @think_aboutit_sites