Bob Schieffer spoke with Zach after reaching his destination and asked the "young philanthropist" if he ever felt like giving up.
"There were definitely times during the walk where you get tired and you don't want to go any further, but a child that's homeless doesn't get to quit being homeless, so why should I quit?" he answered.
Zach also spent 24 hours with homeless children and spent the night in a Sasha Bruce Youthwork's emergency shelter. He did chores alongside them, ate with them, and slept in the same dorm rooms. He is now raising $2,000 to buy 10 new mattresses for the shelter.
In his online journal Zach writes, "No child should be through the things they have been through only to find themselves homeless. I walked away with a better understanding. I can never really understand what their life is like, but I can continue to try and make it better for them. They deserve it."
Zach will soon head to Hollywood as the inspiration for a motion picture produced by the Philanthropy Project and will receive a check for $25,000 from Elton John to his Little Red Wagon Foundation, which Zach created in 2005.
Watch Bob Schieffer's interview with Zach Bonner and catch Washington Unplugged live every weekday at 12:30pm.