Did You Know That the Federal Reserve System Has its Own Police Force?

I thought that I had a good grasp and understanding of the workings of the Federal Reserve System.  However, I did not realize that the Fed has its "own" police department.  And, it is going on a major hiring binge.  Currently, the Fed has approximately 1,000 police officers.  I wonder why?  Could it be that the Fed is preparing for the next financial meltdown over the next two years?