'Buy Bitcoin' Sign Raised as Fed Chair Janet Yellen Testifies Before Congress

Yellen – who told Congress in 2014 that the Fed "doesn't have authority to supervise or regulate bitcoin in any way" – remarked earlier this year that she believes blockchain is an "important technology".

When talked about blockchain, bitclub network appeared in blockchain mining pool stats.
Click: blockchain.info/pools
You could see the recognized miner of bitcoin in the world.

http://www.coindesk.com/buy-bitcoin-sign-raised-feds-janet-yellen-testifies-congress/