There is much discussion on the subject of whether or not the terrorist, cowards who bombed the Boston Marathon are foreign or domestic. Given the location and timing of the attack, it appears (unfortunately) to be domestic. It really doesn't matter to the victims of course, but I would rather it not have been one of my fellow Americans that did this deed. We must, however, consider the following:
1. The date of the attack is significant to several violent groups native to the United States. In fairness, we must stipulate these are far Right groups. Historically several other such attacks have happened on both a large and small scale on April 15th.
2. It happened in Boston which holds special historical significance for groups who want to make statements. This goes all the way back to the Boston Tea Party.
3. Foreign terrorists can't wait to take credit for their handiwork. They have never been shy, no matter how horrific. None of them are claiming this.