We are exploring the role the media plays in a terrorist environment

We are exploring the role the media plays in a terrorist environment.  We know that many groups use the media to disseminate their propaganda.  This is most prevalent in democratic societies or those who enjoy “Freedom of the Press.”  We also know the dangers of allowing terrorist groups unfettered access to media outlets.  with this in mind address the following:  given the propensity for manipulation, are there any circumstances that might warrant the government to place restrictions on what the media can publish?  What might be restricted and how would you justify said restrictions?