The Ozone layer, which mostly lies on the lower portion of the stratosphere.
How Long Did The Vietnam War Last. The Vietnam War is the longest war ever to have taken place in the American history. It lasted for 16 years and it was terrible for the Americans at that time as the Civil Rights campaign was at its peak and so also the Vietnam War and anti war protests.
Vietnam Veterans. United States military involvement in the Vietnam War officially began on August 5, 1964; however, the first U.S. casualty in Vietnam occurred on July 8, 1959. Approximately 2.7 million American men and women served in Vietnam. During the war, over 58,000 U.S. military members lost their lives and 153,000 were wounded.