The major court ruling on the National Security Agency surveillance program has received scant coverage from the nation’s three major networks. On Thursday, ABC, CBS and NBC all led their nightly broadcasts with the latest in the 1996 murder case of child beauty queen JonBenet Ramsey. ABC devoted twice as much time in its broadcast to Ramsey as it did to the NSA story. CBS offered seven times as much airtime to Ramsey as it did to the NSA story. And NBC devoted 15 times more airtime to Ramsey.