All of the "sources" these networks cite are anoynmous government or "expert" sources.
it's the exact same game that was played 10 years ago in the run-up to invading Iraq. Remember how certain everyone was that Iraq had WMD's? Remember how the New York Times and ABC, and NBC and CNN ran with anonymous sources devoid of any truth? Remember how Fox was practically cheerleading the entire time?
People remember, but they just don't care.
Iran is unlikely to initiate or intentionally provoke a conflict - LTG Ronald R. Burgess Jr. Director Defense Intelligence Agnecy; FEB 18, 2012
The intelligence does not show the decision to proceed with developing a nuclear weapon - Leon Panetta US Secretary of Defense FEB 18, 2012
While the Agency continues to verify the non-diversion of declared nuclear material at the nuclear facilities and LOFs declared by Iran under its Safeguards Agreement, as Iran is not providing the necessary cooperation, including by not implementing its Additional Protocol, the Agency is unable to provide credible assurance about the absence of undeclared nuclear material and activities in Iran, and therefore to conclude that all nuclear material in Iran is in peaceful activities. - IAEA report conclusion November 2011
Lol it simply doesn't matter.