Acting Navy Secretary Thomas Modly addressed the crew of the USS Theodore Roosevelt on Monday to defend his decision to fire the aircraft carrier’s commander, Capt. Brett Crozier, who wrote a memo last week demanding more urgent action to address an outbreak of coronavirus. According to a recording of the address and descriptions by relatives of crew members and by U.S. officials, Mr. Modly delivered the remarks to the crew of the ship, which is now docked in Guam as crew members undergo a quarantine because of the Covid-19 outbreak. More than 150 of the approximately 5,000 members of the...