### Parcel Bomb Attempt on Sihanouk **Date**: August 31, 1959 • **Location**: Ho Chi Minh City, Viet Nam A parcel bomb sent by Ngô Đình Nhu (pictured), younger brother and chief adviser of South Vietnamese president Ngô Đình Diệm, failed to kill Norodom Sihanouk, Prime Minister of Cambodia. A letter bomb is an explosive device sent via the postal service, and designed with the intention to injure or kill the recipient when opened. They have been used in terrorist attacks such as those of the Unabomber. Some countries have agencies whose duties include the interdiction of letter bombs and the investigation of letter bombings. The letter bomb may have been in use for nearly as long as the common postal service has been in existence, as far back as 1764.

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