This week marks the 79th anniversary of the atomic bombing of the Japanese city of Hiroshima, which was followed by the atomic bombing of Nagasaki on Aug. 9. In recognition of those terrible events, it is timely to draw the attention to a nuclear weapons issue that requires immediate action at the congressional level. That problem is the unique and unsettling authority of the president of the United States to be the sole person responsible for the launch of U.S. nuclear weapons.