1994, Matewan, West Virginia
1978, Freeport, Texas
1977, Littleton, Colorado
1962, Everglades National Park, Florida
1961, Philip, South Dakota
1961, Colorado Springs, Colorado
1958, Lompoc, California
1950, St. Albans, Vermont
1945, Los Alamos, New Mexico
1944, Los Alamos, New Mexico
1943, Los Alamos, New Mexico
1942, Los Alamos, New Mexico
1942, Jerome, Idaho
1942, Bayard, New Mexico
1942, Hinton, West Virginia
1942, Powell, Wyoming
