Thousands of People Sing "Lean on Me" Stuck in D.C.'s "Tunnel of Doom"

Thousands of people were stuck in the Purple Tunnel of Doom (aka the I-395 Third Street tunnel in downtown Washington, D.C.) for hours and hours. One person came up with a musical way to calm the stress. It's amazing.

Grab the tissues.....this one got me! Why am I crying? - Meredith