Hamas is testing the layers of Israel's sophisticated air-defense network. Here's how it fends off threats.

Hamas is testing the layers of Israel's sophisticated air-defense network. Here's how it fends off threats.

This photograph provided by the Israeli Ministry of Defense on Monday Dec. 21, 2015 shows a launch of David's Sling missile defense system.Ministry of Defense via AP <ul> <li>Israel confirmed using … [+7085 chars]

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