Mainstream Media: What Are They Hiding?

Many vitally important stories are not making the mainstream news broadcasts. Stories on issues like NDAA; SOPA; PIPA; The events in the Persian Gulf; and also in the U.S.  Why?  Is the news being kept from the public to forestall a mass reaction? Is someone trying to control public opinion? Why is more and more news having to be dug up and uncovered by bloggers and others in the Alternative News and Information field? Most of what we get is "Infotainment". What happened to true investigative journalism? Call in with your thoughts.