Take a look at five of the most influential technological developments to come out of the Vietnam War.

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On April 28, 1967, Gen. William Westmoreland, commander of U.S. operations in Vietnam, describes to a joint session of Congress the challenges of fighting a relentless enemy.

In this clip from Ask Steve, the reason for the continuation of the unpopular Vietnam War is discussed. The question of why the war continued for five years after the public turned against it in 1968 is under review. President Nixon's silent majority speech strayed attention from the war by exploiting the division in the peace movement.

US plane spraying Vietnam landscape with tainted herbicide/defoliant Agent Orange during the war. (Credit: Dick Swanson/The LIFE Images Collection/Getty Images)