trinity site opens its gates in Saturday, April, 1 from 8am to 2pm. Trinity site is the place where the first atomic bomb is detonated, it's located in the Jomada del Muerto desert, 85 miles souhwest of Alamongordo.

http://www.wsmr.army.mil/pao/TrinitySite/trinst.htm  ¶ 10:01 PM