The border is not just empty, it is barren.On all sides, an ultra-still, uniquely desert quietude and tranquility surrounds the sand dunes we are standing atop, spoiled only occasionally and briefly by the sound of gusts of wind.This area – the Bar-Lev Lookout Point – is Israel's most peaceful border, the border with Egypt.And yet, a bit northeast of Ezuz and a bit southeast of Nitzana and Kadesh Barnea, it is far less peaceful than it was in the past, leaving the IDF, the Shin Bet (Israel