171003-N-KK081-090 SAN FRANCISCO (Oct. 3, 2017) Frank Harrah, center, an instructor with the Northern California Rescue Training, explains debris clearing techniques to Sailors and Marines during urban search and rescue training for Fleet Week San Francisco 2017. Fleet weeks provide an opportunity for the American public to meet their Navy, Marine Corps and Coast Guard team and experience America's sea services. Fleet Week San Francisco will highlight naval personnel, equipment, technology and capabilities with an emphasis on humanitarian assistance and disaster response. (U.S. Navy Photo by Mass Communication Specialist 2nd Class Eric Chan/Released)