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Long & Foster Realtors.
Downtown Silver Spring
There's a Wheaton Metro stop in Silver Spring. Here's the link: http://www.wmata.com/rail/station_detail.cfm?station_id=33
There are also a lot of buses serving Wheaton and connecting at the Metro station. Here's the link: http://www.wmata.com/rail/station_bus_maps/PDFs/Wheaton.pdf
Hope that helps.