This case was very similar to the Roswell incident in New Mexico Stats of USA .
I heard that an UFO actually crashed at a place nearer to Corona than Roswell, but the wreckage was transported to a local governmental facility located in Roswell.
The year ‘1963’ more vividly reminds me of the following case.
「ケネディ・アメリカ大統領銃撃現場 ( 1963/11/22 )」 http://www.oshimaland.com/?p=9xlo8qxl
