 Hannity. The Tunnel to Towers Foundation honors our nation's greatest heroes, their sacrifices, and helps our nation to never forget. Mario Nelson was a special man who respected and loved America. Mario joined the National Guard and after 9-11 he volunteered to help with the recovery efforts at Ground Zero. Later, Mario and his wife had a daughter. Motivated by his 9-11 experience, he enlisted in the U.S. Army.