Huge TFR Around Washington?

So, I was flying from my home base at York, PA today and saw a huge
TFR around Washinton on my 496. What the heck is that, I'm thinking?
It goes all the way out the HGR and nearly up to THV. Harrisburg
Approach didn't know anything about it, and a Cirrus who was on the
freq at the time reported seeing it on their system, too. I now see
from FlightStar that it's just a speed restriction to 230 KIAS, out as
far as 60nm from DCA. Looks rather scarey in the map, though, and it
would be nice if they actually told Approach facilities about it...