Inherent in your statement is the assumption that Tamerlan and Dzokhar Tsarnaev didn't receive any planning, logistical, or help in executing their terrorist plan.
To date, that's still not clear what help if any they received or if they're part of a larger sleeper cell.
Jury's still out on that one. At least an intelligent jury still is.
Far as I'm concerned, the Boston Police, FBI and the good people of Boston's actions were nothing short of admirable in the pursuit and capture of these two terrorists.
I’ve a lot more respect for the Boston PD than the FBI which i consider unconstitutional and part of an out of control government but I agree with what you’re saying.
It’s up to the PD how they deal with it but shutting down a city is slightly overreacting.
I’m not saying it’s wrong for them to do so. They can do what they like but just giving an opinion.