As Air Force One prepared to touch down in the Holy Land last year, I looked out my window and was once again struck by the fact that Israel’s security can be measured in a matter of minutes and miles. I’ve seen what security means to those who live near the Blue Line, to children in Sderot who just want to grow up without fear, to families who’ve lost their homes and everything they have to Hezbollah’s and Hamas’s rockets. And as a father myself, I cannot imagine the pain endured by the parents of Naftali Fraenkel, Gilad Shaar and...