Gentlemen,
The second mystery image is: The Davy Crockett.
The Davy Crockett consisted of an XM-388 projectile launched from either a 120-millimeter (XM-28) or 155-millimeter (XM-29) recoilless rifle (the 120 millimeter version is shown above). This weapon had a maximum range of 1.24 miles (120 millimeter) to 2.49 miles (155 millimeter). The XM-388 casing (including the warhead and fin assembly) weighed 76 pounds, was 30 inches long and measured 11 inches in diameter (at its widest point).
The W54 warhead used on the Davy Crockett weighed just 51 pounds and was the smallest and lightest fission bomb (implosion type) ever deployed by the United States, with a variable explosive yield of 0.01 kilotons (equivalent to 10 tons of TNT, or two to four times as powerful as the ammonium nitrate bomb which destroyed the Alfred P. Murrah federal building in Oklahoma City on April 19, 1995), or 0.02 kilotons-1 kiloton. A 58.6 pound variant—the B54—was used in the Special Atomic Demolition Munition (SADM), a nuclear land mine deployed in Europe, South Korea, Guam, and the United States from 1964-1989.
Reference: [url]http://www.brook.edu/FP/projects/nucwcost/davyc.HTM[/url]
I will post some more mystery photos later. I did not know so many people would enjoy it!