[Scan-DC] Smithsonian and union station radio information?

[John Pak hotmail]

Hello list,
I was looking on radio reference for radio information for the Smithsonian and found that they use a ltr trunked system.
However, they do not list any talk group information.
Does any one have talk group information?
Also, is any one aware of any conventional frequencies that they use?
I am also looking for frequencies for union station security/ops and the International Spy Museum.
Any help any one can provide would be very much appreciated.
Regards
John