One year ago, Islamic terrorists set off two bombs at the Boston Marathon, killing three and injuring nearly 300 people.

Author and Islam expert Robert Spencer says that attack marked a resurgence of Islamic jihad on American soil.

When the "Arab Spring" revolutions began in Tunisia and Egypt in 2011, many in the West hailed the uprisings as the beginning of a new era of democracy and pluralism in the Middle East.

But that didn't happen. Instead, the region is less stable, more uncertain, and more violent than before.

On the anniversary of the Boston marathon bombing, Spencer has released his newest book, Arab Winter Comes to America: The Truth About The War We're In.

Spencer says the same radical Islamic groups that caused the "Arab Spring" in the Middle East are at work in America right now, exposing Americans to even more threats of jihad.

He warns that the country is shockingly unequipped to face this threat.

Robert Spencer talked more about his newest book and the driving force behind the jihadists operating now in the United States, on The 700 Club, Monday, April 14.