SAN DIEGO — A massive fire dooms a warship in San Diego’s waterfront. Training accidents kill 11 in San Clemente Island. Some long deployments come to an end as others are just beginning. These are a few of the stories affecting the San Diego military community in 2020. Underpinning it all is the coronavirus pandemic, which sickened many and strained local military forces as they tried to maintain regular operations. The pandemic tested military leaders and changed day-to-day operations. Sailors endured weeks-long quarantines before going to sea. and Marine recruits isolated in hotels before starting boot camp. Advertisement Before the virus reached US shores, the year began with tensions escalating into violence between the United States and Iran, as both countries sought to exert influence in Iraq.