[Blasterlord2]

CIA already informed their citizens to avoid the concert. They knew what's going to happen.
Evil to the core. 
Killing killing and more killing.

But they also warn the Russians about it wor. 

US National Security Council spokesperson Adrienne Watson said the US government had had information about a planned terrorist attack in Moscow – potentially targeting large gatherings, to include concerts – and that this is what prompted the State Department to issue the public advisory.

“The US government also shared this information with Russian authorities in accordance with its longstanding ‘duty to warn’ policy,” Watson said.

In a speech Tuesday, Putin had blasted the American warnings as “provocative,” saying “these actions resemble outright blackmail and the intention to intimidate and destabilize our society.”