What did Obama know and when did he know it?

[Christians4LessGvt]

"They kept making announcements to the participants do not worry, it's just a training exercise," Coach Ali Stevenson told Local 15.

Stevenson said he saw law enforcement spotters on the roofs at the start of the race. He's been in plenty of marathons in Chicago, D.C., Chicago, London and other major metropolitan areas but has never seen that level of security before.
　
"Evidently, I don't believe they were just having a training exercise," Stevenson said. "I think they must have had some sort of threat or suspicion called in."


http://www.local15tv.com/mostpopular/story/UM-Coach-Bomb-Sniffing-Dogs-Spotters-on-Roofs/BrirjAzFPUKKN8z6eSDJEA.cspx