SAN DIEGO (April 16, 2021) Chief of Naval Research, Rear Adm. Lorin Selby, observes a Vanilla Ultra Endurance unmanned aerial vehicle on Pier 12 during Integrated Battle Problem 21 (UxS IBP 21) Distinguished Visitors day at Naval Base San Diego. U.S. Pacific Fleet�s UxS IBP 21, April 19-26, integrates manned and unmanned capabilities into the most challenging operational scenarios to generate war fighting advantages. (U.S. Navy photo by Mass Communication Specialist 2nd Class Natalie M. Byers)