Black and white image of equipment being lowered into Hoover Dam. People are watching from the lookout point on the Nevada side of the dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Atomic fireball and mushroom cloud, photographed by Sgt. Robert Cogswell of the U.S. Army. Inscription with photo reads: "from News fifteen and one-half miles from ground zero March 7, 1955, by an Army Signal Corps cameraman."

This is comprised of all the Tweets captured and the images that were associated with the collected Tweets. The Tweets are expressed in JSON and have been separated into zip files representing 24-hour intervals.

Access to these data is restricted to UNLV faculty, staff, and students. These data are accessible online, at UNLV Lied Library, at: https://n2t.net/ark:/62930/d1z31nv8w. Due to the size of the dataset, direct file transfer is also available at the UNLV Lied Library during Special Collections and Archives hours of operation. Visit the Special Collections and Archives Reading Room located on the third floor of the Lied Library to receive a direct transfer of files. For specific questions, please contact special.collections@unlv.edu.