Noam (2nd R) and Aviva (2nd L) Shalit, the parents of captive Israeli soldier Gilad Shalit, take part in a march in the northern city of Nahariya June 27, 2010. The parents of the Israeli soldier held in the Gaza Strip since 2006 began the 12-day march on Sunday from their northern home to Prime Minister Benjamin Netanyau's Jerusalem residence to press for a prisoner swap.