This coming September marks the 18th anniversary of a day that changed America forever: the terrorist attacks on New York's World Trade Center, now known as 9/11.
While most people honor those who lost their lives closer to the day, one foundation works hard to ensure the heroes and victims are never far from memory year-round.
A mobile memorial display, launched by Stephen Siller Tunnel to Towers Foundation in 2013, is intended to educate people across the country about the terrorist attacks that cost thousands their lives and includes guided tours by retired New York Fire Department firefighters, actual steel beams from the twin towers and recordings of first responder radio transmissions. The 53-foot semitractor-trailer, which transforms into a 1,000-square-foot exhibit, arrived at Centennial Park Wednesday, just in time for Memorial Day weekend, and will be on display until Wednesday.