An interior view of a cave at an unidentified archaeological site. Excavation tools can be seen in image.

Black and white image of the low mix concrete plant on the Colorado River. Two bridges and and construction can be seen in this image as well.

Black and white image of the lowering of what appears to be a gondola car onto power house tracks at Hoover (Boulder) Dam.

Color image of signs reading "Lord God must this vessel be broken." The signs were placed in the desert by the Lenten Desert Experience (also called the Nevada Desert Experience), a group demonstrating against nuclear testing.

Color image of a man with a video camera and possibly a reporter asking questions of protesters with the Lenten Desert Experience (also called the Nevada Desert Experience), a group demonstrating against nuclear testing.

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). Corbin Harney is a West Shoshone Indian. The banner behind Harney reads: "Peace In the Desert". (n.d)

Color image of a protester dancing in the desert near the Nevada Test Site at a demonstration to oppose nuclear testing.