29 March 2021 CDS-21 USNS MERCY COVID-19 Mission Capt. Daniel Cobian, commodore of Destroyer Squadron 21, and key members of his staff embarked hospital ship USNS Mercy (T-AH 19) in support of the nation's COVID-19 response efforts. The hospital ship arrived in Los Angeles March 27, 2020, bringing the first aboard March 29, 2020. The Mercy served...