North Korea has threatened the United States with a preemptive nuclear attack. The threat came hours before the United Nations Security Council approved tougher sanctions against the regime. North Korea is not believed to have the capability the launch such a strike. Sally Kidd is in Washington with the latest.
The Yahoo board has reportedly approved a deal to pay $1.1 billion in cash for the blogging site Tumblr. Rumors had been swirling late last week that Yahoo CEO Marissa Mayer was in talks with Tumblr CEO David Karp.