The 21st annual Boston Medical Center Gala was held Saturday at the Seaport World Trade Center. Former WCVB-TV news anchor Heather Unruh served as emcee, and the guests of honor included Governor Charlie Baker, Ken Casey of the Dropkick Murphys, BMC’s Project ASSERT supervisor Ludy Young, and Berto Sanchez, manager of the Boston Public Health Commission’s citywide overdose prevention program. The gala raised $3.5 million. Pictured (from left): Casey, Young, Baker, BMC president and CEO Kate Walsh, and Sanchez.