By Dawn Chmielewski LOS ANGELES (Reuters) -A gunman opened fire in a Southern California church during a lunch banquet on Sunday, killing one person and wounding five, before churchgoers detained the suspect and hog-tied his legs with an electrical cord, authorities said. Police responded to the incident that unfolded at about 1:30 p.m. local time (2039 GMT) at the Geneva Presbyterian Church in Laguna Woods and arrested an unidentified suspect in his 60s, Orange County Undersheriff Jeff Hallock told a news conference. “That group of churchgoers displayed … exceptional heroism and bravery in …