The reporting stimulated ‘important discussion about the balance between privacy and security, and that discussion is still going on,’ the prize administrator says.

After taking a wrong turn, the father became lodged between canyon walls, while his sons, 8 and 11, stayed on a ledge above for three days.

He was sentenced in August 2013 for leaking more than 700,000 secret military and State Department documents while serving in Iraq in 2009 and 2010.