Cleanup work at 4825 Glenbrook Road
Soil is excavated and sifted for debris as part of cleanup efforts at 4825 Glenbrook Road in Washington, D.C., April 25, 2016. The home at 4825 Glenbrook Road was demolished in 2012 and crews removed soil and aspects of the home down to bedrock as part of a cleanup effort of the property, which was part of the former American University Experiment Station where the Army researched and tested chemical weapons during World War I.

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Photo by: File Photo |  VIRIN: 160425-A-WZ074-001.JPG