Mine Systems. Modular Pack Mine System (MOPMS) MOPMS is a man-portable antitank/antipersonnel (AT/AP) mine system with command detonation capability. It weighs 165 pounds and contains a mix of 17 magnetically fuzed AT mines and four AP mines. Its 4-hour self-destruct command can be recycled three times or command detonated by remote control.
The 13th Amendment to the Constitution of the United States was ratified on this date in 1865. It reads, Neither slavery nor involuntary servitude shall exist in the United States.
The Congress proposed the Twenty-first Amendment on February 20, 1933. The proposed amendment was adopted on December 5, 1933. It is the only amendment to have been ratified by state ratifying conventions, specially selected for the purpose. All other amendments have been ratified by state legislatures.