Fifty years after the Cuban missile crisis pushed the Soviet Union and United States to the brink of nuclear war, many of key players are well known: the cool-headed President John F. Kennedy who faced down his hawkish generals; the seemingly diplomatic and then recalcitrant Soviet leader Nikita Khruschev; the dealmaking US Attorney General Robert F. Kennedy whose back-channel negotiations ultimately led to a peaceful resolution of the 13-day crisis. But the unsung hero in the view of many was 35-year-old Major Rudolf Anderson Jr., who was killed on October 27, 1962, when his U-2 spy plane was shot down over Cuba, making him the only military casualty of the crisis and shaking Washington and Moscow into cutting a deal.