Here, let me help you with that:
1983 Marine Bombing
Here is another reason:
Twenty-six years ago, the world watched one of the most horrific atrocities taken against innocent civilians—this event was aired live on televisions around the world. TWA Flight 847 was hijacked, terrorists held their captives for seventeen days, and brutally murdered 23-year old Robert Stethem, a proud American and a U.S. Navy diver. This terrorist attack was conducted by the Iranian supported terrorist group Hezbollah.