Two gunmen who attacked a Jewish celebration in Sydney's Bondi Beach that killed 15 people were a father and son, police said on Monday, as Australia mourned victims of its worst gun violence in almost 30 years. The father, a 50-year-old, was killed at the scene while his 24-year-old son was in critical condition in the hospital, police said at a press conference on Monday. Officials have described the shooting on Sunday as a targeted antisemitic attack. Witnesses said the attack at the famed beach, which was packed on a hot evening, lasted about 10 minutes, sending hundreds of people...