This pm at at ~ 2, while watching for raptors aloft, we saw a Red-tail 
high up heading north, at times supported by thermals. Congratulating 
ourselves on a new yard bird for the year, we then noticed a larger, 
all-dark, raptor following, perhaps ridng the same wind currents. It had 
broader wings, but not quite like those of a Bald Eagle, with 
conspicuous white wing patches about 2/3 of the way to the wingtips, not 
quite reaching front or rear wing edge. The undertail showed no white, 
but was largely obscured by the large feet.

I hesitate to put the name on this raptor, but post in the hopes that 
some other birder(s) may have also seen it.

Fred Fallon
Bowie MD