What the fuck? I just read an interesting article on Mother Jones which lists 11 mystifying things the Tsarnaev brothers did, and one of them in particular made me double take; Number 7:
The quest to find a working ATM was how they ended up, coincidentally, at a 7/11 in Cambridge around the same time it was the scene of an armed robbery, and were spotted on the store security camera.
So these two brothers, who had just set off bombs in a crowded public area a few days earlier, while trying to escape the police by carjacking some random person and stealing money from their bank accounts, just happen across another armed robbery happening. Completely unrelated.
Either this is an astronomically unlikely event, or Boston is like Gotham City without batman, and crime is just around every corner.