The Navy's Large-Scale Exercise 2021, which started Tuesday, is the service's biggest exercise in recent history, Chief of Naval Operations Adm. Michael Gilday said Monday. Gilday, speaking at the Navy League's Sea-Air-Space conference, said the exercise will include 25,000 sailors and Marines in the Atlantic, Pacific and Mediterranean. "It's the biggest exercise we've done in a generation," Gilday said. "Certainly, we want to continue to test our warfighting concepts." The Navy and Marine Corps will demonstrate a series of concepts,...