Very bright flash and explosion over Lincoln, Ne., on Thanksgiving.The only phenomena present in the incident was a sudden very loud report and simultaneous atmospheric strobe. From military experience, the explosion was very similiar to that of a medium to large caliber artillery munition. the sound seemed to come from directly over the city. This was heard by my wife and me and two teen-age daughters. One daughter was looking out the window at the time and reported a very bright (like daylight) flash of light just before the sound. Although I suspect a low atmosphere meteor detonation, I am unable to confirm it.