Player Embed Code: Download Embed Share USNS Mercy Arrives at Port of Los Angeles Defense.gov March 27, 2020 | 43:16 Navy Rear Adm. John E. Gumbleton, commander of Expeditionary Strike Group 3, conducts a patient-path walkthrough aboard the Navy hospital ship USNS Mercy with state and city officials in Los Angeles and answers questions at a news conference, March 27, 2020.