Pictures Of Two People Of Interest That Law Enforcement & The F.B.I. Are Seeking, But What About The Others?

I don't know why they are only showing two suspects, when the pictures that I saw, showed at least FIVE individuals carrying the same kind of backpacks and they also had earphone mic's and were in communications with someone.  Yes, these two in the pic were two of them, but there were at least THREE MORE who are not being shown, and remember there were other bombs that did not ignite and were disarmed.
Dr. James P. Wickstrom

Police are seeking these two men as "persons of interest," the Post reported. There is no direct evidence linking them to the crime. (New York Post)

Photos Show 'Persons of Interest' in Boston Marathon Bombings