Johnston Atoll and biological weapons testing site, a secret missile base, and a chemical weapon and Agent Orange storage and disposal site. These activities left the area environmentally contaminated and remediation and monitoring continue. The Johnston Atoll is a deserted atoll in the North Pacific Ocean located about southwest of the island of Hawai'i and is grouped as one of the United States Minor Outlying Islands. The atoll, which is located on a coral reef platform, has four islands. Johnston (or Kalama) Island and Sand Island are both enlarged natural features, while "Akau" (North) and "Hikina" (East) are two artificial islands formed
Oroluk Atoll Oroluk Atoll Oroluk Atoll is an atoll belonging to Pohnpei State in the Micronesia. Oroluk Atoll stretches from the northwest to the southeast with a length of about and an average width of . The lagoon's surface is roughly . The more than 25 sandy islets and banks, predominantly on the eastern rim of the atoll, have been washed away by cyclones through the years. Only one island remains, Oroluk Island in the very northwest corner of the atoll. Oroluk Atoll is believed to have been first discovered and named by navigators from Namoluk Island in the Mortlock Islands. The