I quickly read the article and was stunned. The central document was a Top Secret/Eyes Only summary memo of a July 1961 National Security Council meeting written by Howard Burris, the military aide to then-Vice President Lyndon Johnson, which was afterward deposited in the Johnson Archives and eventually declassified. The discussion focused on the effectiveness of a planned nuclear first strike, suggesting that 1963 would be the optimal date since America’s relative advantage in intercontinental nuclear missiles would be greatest at that point.