![AAPT Summer Meeting 2018 in Washington, DC](images/SM18_Meetings_Logo_blue_ped_1.png)
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The Metro system is the nation's second-largest heavy rail system. — www.washington.org
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Some photos courtesy of washington.org
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The Metro system is the nation's second-largest heavy rail system. — www.washington.org
Some photos courtesy of washington.org
![]() |