Since the advent of their pioneering activism, which spanned the 1960s, many books have been written to commemorate their successes, but the first one that was published in 1964 by one of their few adult advisers was Howard Zinn's SNCC: The New Abolitionists.
Length of Vietnam War http://en.wikipedia.org/wiki/Vietnam_War According to wikipedia, it was fought for 11 years against France between 1946-1957 and 18 years against the U.S. between 1957-1975. Exact dates are sketchy.
It was apparently based on an estimate that 800,000 Vietnam-era veterans had died by 2000. That number was reasonable: About 9.2 million Americans served in the military during the Vietnam era (1964-75), so that would mean about 8 percent of them had died and 92 percent were still alive.