Isn't one of these problems that these orgs are facing is that their signal-to-noise is too rough to work with? I thought they had info about the boston bomber

Isn't one of these problems that these orgs are facing is that their signal-to-noise is too rough to work with? I thought they had info about the boston bomber, 9/11 hijackers, and san bernadino shooter, but didn't act on it because it was lost in the noise?