I really don't see ISIS doing an airborne Assault ect on American Soil. But they don't have to physically land on our soil to case us a a lot of problems and even cost the lives of some Americans.

What if ISIS does take over Iraq and maybe even Syria.

And what if either ISIS then attacks Saudi Arabia or their Victory results in Anti House of Saud extremists attempting to overthrow the Saudi Royal Family.

And what if they succeed.

And what if Muslim Extremists take control of most of the Persian Gulf and Middle East except for Israel.

This most likely sounds extreme but stranger things have happened.

And even without all of this occurring, what would be the result of most if not all of Oil Producing Regions of the Middle East becoming Islamic Republics under control of Fundamentalist Muslims who HATE Israel and the United States.