Four men have been arrested in an alleged plot to detonate bombs outside New York City synagogues and to shoot down military planes with guided missiles at an Air National Guard base. For more on this story, click here. Meanwhile the global War on Terror continues. As we approach Memorial Day America's fighting men and women continue to wage war against Al Qaeda overseas.

YOU DECIDE: Which is the bigger threat to the safety and security of the United States -- homegrown terrorism or international Islamic terrorism? Share your thoughts. Click on "Leave a Comment" below.