Sen. Mark Warner, D-Va., and Del. Eleanor Holmes Norton, D-D.C., hope to make the services permanent before they end next month.

U.S. senators have raised security concerns about a new Metro railcar project. The NIST cybersecurity framework will be part of the process now, the transit authority says.

The lawmakers exhorted the subway system's leadership to “take the necessary steps to mitigate growing cyber risks" to new railcars that could be produced by a Chinese…