The Daily Mail is the only source reporting this at the moment, so make sure you have your salt shakers handy...
EXCLUSIVE: 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.
Citing security concerns, the Saudi government also denied an entry visa to the elder Tsarnaev brother in December 2011, when he hoped to make a pilgrimage to Mecca, the source said. Tsarnaev's plans to visit Saudi Arabia have not been previously disclosed.
The Saudis' warning to the U.S. government was also shared with the British government. 'It was very specific’ and warned that 'something was going to happen in a major U.S. city,' the Saudi official said during an extensive interview.
It 'did name Tamerlan specifically,' he added. The 'government-to-government' letter, which he said was sent to the Department of Homeland Security at the highest level, did not name Boston or suggest a date for his planned attack.
The Most Transparent Administration in The History of the World (TM) is, of course, denying any knowledge of this warning. Indeed, they have refused to admit to the existence of a country that may or may not be called "Saudi Arabia". They have also denied knowledge of any American city named "Boston", claim only a vague understanding of what "running" is, and when asked to find their rear ends, reportedly asked for a flashlight, a map, and a five minute head start.
In other words... "What difference, at this point, does it make?"