STRANGE OBJECTS IN U.S. SKY OBSERVATION BY RADAR FROM OUR OWN CORRESPONDENT WASHINGTON, July 22 United States Air Force officials, who have been checking the many recent reports of "flying saucers" submitted them from ja various parts of the country, are to-day in- vestigating reports that seven to 10- identified aerial objects were noted on radar screens here early on Sunday morning. These objects appeared to be over Andrews Air Force basc, in Maryland. unt- The Air Force announced last night that the objects had appeared on the radar screen in the air route traffic control centre at the National Airport first on one section of the screen, and then, sood afterwards, on another section, which showed them moving in a differ- ent direction. Their speed was only 100 to 115 miles an hour, which is very slow for flying saucers," One pilot watched the objects for about 12 minutes as he flew from Washington to Martinsburg. in West Virginia. Another pilut reported that, a brilliant light had fol lowed his aircraft from Herndon, in Virginia to within four males of the National Airport