How Long We Could Have To Wait To Know Who Was Behind The Boston Bombing
If past investigations into bombings in the United States are any indication, it could be a while.
Oklahoma City: 90 Minutes
1993 World Trade Center Bombing: 6 Days
Unabomber Bombings: Years
1996 Olympic Park Bombing: More Than a Year
1998 U.S. Embassy Bombings: Days
The Sept. 11 Attacks: Almost Immediately