John Hubbell reached me here at my office and asked me to post the following: 

He is at Piscataway Park observing two adult Mississippi Kites.  

To reach the area where he is, exit south from the Capital Beltway onto Indian Head Highway (MD Route 210 South), the go
approximately 9.2 miles. After you pass Farmington Road, you will take
a right at the next stop light onto Livingston Road (look for B&J
Carryout). Drive one block and turn right on Biddle Road. At the stop
sign, turn left on Bryan Point Road.  Proceed on this road to the Accokeek Creek parking area (on your right).  Go to the boardwalk, walk on it to its end.  The birds have been soaring over the field at the end of the boardwalk near the southern end of the field.  (So the lighting may or may not be the best).  

Good birding, 

Rob Hilton
Silver Spring, Maryland