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 United States enters the war. Between the Gulf of Tonkin Resolution and the U.S. presidential election in November 1964, the situation in Vietnam had changed for the worse. Beginning in September, the Khanh government was succeeded by a bewildering array of cliques and coalitions, some of which stayed in power less than a month.