Around 2/3 of women experience shortness of breath as a part of a normal pregnancy. Neurological conditions such as spinal cord injury, phrenic nerve injuries, Guillain-Barre syndrome, amyotrophic lateral sclerosis, multiple sclerosis and muscular dystrophy can all cause an individual to experience shortness of breath.
On August 2, 1964, the U.S. destroyer Maddox exchanged shots with North Vietnamese torpedo boats in the Gulf of Tonkin. Two days later, the Maddox and another destroyer reported once again coming under fire.
The Gulf of Tonkin Crisis, and the subsequent Gulf of Tonkin Resolution, proved to be a major event in the Vietnam War. After irritating North Vietnam with DeSoto and OPLAN-34A missions between fall 1963 and July 1964, the North Vietnamese responded on August 2, 1964.