Yes two guys. AND NOBODY ELSE.
Asking questions is not a conspiracy theory, don’t be ridiculous.
As a matter of fact, the FBI wants two guys - which is a conspiracy. Are there others involved?
The photos the FBI referred to without naming came from the 4chan channel on imgur.com. Who took those pictures? Some of those pictures are from a second story window above the bomb-site. Who is the tenant there? Did someone associated with the tenant take those pictures? Is it a vacant office? Is it open to the public?
It could be just an average citizen noticing identically dressed guys.
There were identically dressed guys and that is not a conspiracy theory. Note that I am not attaching anything nefarious to them, I only ask who and why.
The only way answering these questions would be “wasted resources” would be if they don’t have the answer, if they don’t know who they are: in which case it wouldn’t be wasted resources to find out who they are. They are definitely not civilian.
The reason why the FBI is after those two guys is because the one with the white hat was on a video dropping the bomb off at one bombing location. And they both show up at both locations ... and in addition ... they are both together, following in single file.
When you’ve got a video of a guy dropping a bomb off at the bomb site, you go after him and his accomplice - and not some shadow on the roof ... LOL ...
And the pictures and video the FBI has released to the public is at these links:
http://www.fbi.gov/news/updates-on-investigation-into-multiple-explosions-in-boston
http://www.fbi.gov/news/updates-on-investigation-into-multiple-explosions-in-boston/photos
https://www.youtube.com/watch?v=M80DXI932OE