Mystery Planes Fly Over Los Angeles 1 *1 Stimson, Commenting On Anti-Aircraft Fire, Say* It I* Better To Be Alert WASHINGTON, Feb. 28.-W>-An Army report that as many as 15 planes may have been operated by "enemy agents” over the Los Angeles area, where an air raid alarm early yesterday sent anti aircraft guns into action, was made public today by Secretary of War Stimson. Coming a day after Secretary Knox had told reporters that Navy Department- information indicated the episode was "a false alarm/’ tiie Army report said the unidenti fied craft might have been com mercial planes flown over the area by enemy agents to spread alarm, disclose anti-aircraft gun positions, and test the effectiveness of black outs. No bombs were dropped, there were no casualties among Ameri can forces, no planes were shot down, and no American Army or Navy planes were in action, Stim son said. The secretary announced that the report came to him from General George C. Marshall, army chief of staff, and apparently was based on information relayed by West coast Army officials. The conclusion that the planes might have been obtained from commercial sources, he said, was based on the varying speeds of the planes and the fact that no bombs were dropped. “As many as 15 planes may have been involved,” said the report, “flyir.g at various speeds, from what is officially reported as be ing ‘very slow’ to as much as 20 miles per hour, and at an eleva tion of from 9,000 to 18,000 feet.” Elements of the 37th Coast Ar tillery Brigade, composed of anti aircraft forces, fired 1,430 rounds of ammunition between 3:12 and 4:15 a.m., Pacific War Time, dur ing yesterday's alarm, Stimson said. The secretary said the only com ment he wanted to add to the re port was that “perhaps it is bet ter to be too alert than not alert enough. A any rate, they were alert there.” In Los Angeles Wendell Willkie, arriving for an address tonight, told interviewers: “Conflicting statements from the heads of our armed forces tend to discount what they may say in the future. It was this same lack of coordination and confusion that ' brought the disaster at Pearl Har bor.” Willkie applauded the Army’s quick response to duty, asserting “whether there were enemy planes or net, it is always wise to be on the sid