First test bomb detonated at Trinity Site, Alamogordo, New Mexico
Device hooked up to 100 ft tower and was blown up early that morning.
The flash was visible for 200 miles, formed a crater a half mile wide in which the sand turned to glass, the mushroom cloud reached 40 000 ft and it blew up windows of homes up to 100 miles away.
A cover up story about an explosions dump was released to not worry the public.
Videos of the test launch