These people could be selling remote planes in your Mall or members of the Muslim Students Association. Muslims Student Association is the right hand group for the Muslim Brotherhood, which finances Hamas.
If you have seen them contact the FBI
To Provide Tips in the Investigation
If you have visual images, video, and/or details regarding the explosions along the Boston Marathon route and elsewhere, submit them on https://bostonmarathontips.fbi.gov. No piece of information or detail is too small.
You can also call 1-800-CALL-FBI (1-800-225-5324), prompt #3, with information