One dead and two missing after pontoon boat sinks near Alcatraz Island

One person died, two others remained missing, and 16 people were rescued Tuesday after a three-deck pontoon boat sank near Alcatraz Island in San Francisco Bay, prompting a large search-and-rescue operation involving divers, helicopters, and multiple emergency agencies. San Francisco Fire Chief Dean Crispen said crews responded shortly after 3:30 p.m. to reports of a…