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.
And today The Other War has gained a fresh and dubious distinction: it is the longest war in our nation's history, surpassing the conflict in Vietnam. 103 months passed between passage of the Gulf of Tonkin Resolution and the withdrawal of the last American combat forces from Vietnam. As of today, the Afghanistan war is 104 months old.