NOT PAYING ATTENTION: Saudi Arabia ‘warned the United States IN WRITING about Boston Bomber Tamerlan Tsarnaev in 2012.’ “The Kingdom of Saudi Arabia sent a written warning about accused Boston Marathon bomber Tamerlan Tsarnaev to the U.S. Department of Homeland Security in 2012, long before pressure-cooker blasts killed three and injured hundreds, according to a senior Saudi government official with direct knowledge of the document. The Saudi warning, the official told MailOnline, was separate from the multiple red flags raised by Russian intelligence in 2011, and was based on human intelligence developed independently in Yemen.”

So we were warned about him by both the Russians and the Saudis and still did nothing? What exactly are all those hundreds of billions for Homeland Security going for?

Related: Sleeping through the “wake-up” calls.

UPDATE: WaPo: As FBI expands Boston investigation, Obama defends law enforcement efforts.

ANOTHER UPDATE: DHS denies any knowledge of Saudi warning.