It turned to out be a Black-American ex-soldier who'd joined the Nation of Islam and legally changed his name to "Muhammed". He was driving a vehicle that was neither white nor a van. He killed 21 people, and eluded capture for a month. That was October of 2002.
I don't mean to 'compare' the American rebels of 1775 with a pair of Chechen terrorists of 2013. A more-valid synchronicity to note would be this:
- October 2002: The sniper terror attacks around Washington, DC (discussed above) occur.
- October 2002: The Chechen Tsarnaev family arrives in the USA. The family came in on a tourist visa, claimed to need political asylum, and were allowed to stay indefinitely. The future-terrorist brothers were 9 and 16.
Finally, I find it interesting that the younger one's Twitter account shows he was a bit of a "whigger". It's likely he would have protested if you'd called him "White" to begin with, though (a prerequisite for being a "whigger").