A man walks through the rubble left by the collapse of the south tower of the World Trade Center on Sept. 11, 2001.
(DOUG KANTER/AFP/Getty Images)
Sunday will mark the 15th anniversary of the 9/11 attacks, and it is incredible to think how much time has passed since that day. Like so many traumatic events, 9/11 has imprinted in most people's minds where they were and what they were doing when two airliners struck the twin towers of the World Trade Center that once dominated the New York City skyline and a third jet hit the Pentagon. In the weeks that followed, it was not uncommon to hear people say things like "the attacks changed everything" and "nothing will ever be the same." A sense of patriotism spread across the United States, and foreign leaders declared that the whole world was American. But in the years since, human nature and entropy have shown how fleeting such sentiments can be.
One of the things that 9/11 supposedly changed forever was the United States' approach to national security and...