Frank Siller, the philanthropic brother of a fallen 9/11 first responder, finished his 537-mile journey on Saturday from Washington D.C. to New York City in honor of the thousands who lost their lives in the attacks 20 years ago.

Frank Siller, the philanthropic brother of a fallen 9/11 first responder, finished his 537-mile journey on Saturday from Washington D.C. to New York City in honor of the thousands who lost their lives in the attacks 20 years ago.