A window into Gaza's elaborate tunnel complex
In the past few weeks, five tunnel collapses in the Gaza Strip have killed 11 Hamas fighters. Hamas leaders are boasting that the group is working overtime on efforts to penetrate the Israeli border, apparently to stage a kidnapping or a mass-casualty attack on Israel.
Yet Hamas’s vast underground transport network is used for more than just attacking Israel. Here are a few key facts about the territory's subterranean world.