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- After Hamas launched its biggest attack on Israel in years, Israel said it was in "a state of war."
- Israel's Benjamin Netanyahu said Hamas and Gaza would pay an "unprecedented price."
- If past retaliations are any indication, Israel's response could be devastating for Gaza.
Israeli Prime Minister Benjamin Netanyahu declared "a state of war" after Hamas launched a wave of attacks from the Gaza Strip on Saturday, killing at least 150 Israelis and injuring many others.