Constructions workers are seen at a new building site in Silver Spring, Maryland, U.S. June 2, 2016. REUTERS/Gary Cameron

Constructions workers are seen at a new building site in Silver Spring, Maryland, U.S. June 2, 2016. REUTERS/Gary Cameron

Constructions workers are seen at a new building site in Silver Spring, Maryland, U.S. June 2, 2016. REUTERS/Gary Cameron

June 6, 2016 2:42 PM (UTC+8)