SYDNEY, Dec. 16 -- Australia vowed stricter gun laws on Monday as it began mourning victims of its worst mass shooting in almost 30 years, in which police accused a father-and-son duo of killing 15 people at a Jewish celebration at Sydney's famed Bondi Beach. Of the two gunmen, the 50-year-old father was killed at the scene, taking the tally of dead to 16, while his 24-year-old son was in critical condition in hospital, police told a press conference. National broadcaster ABC and other media identified the men as Sajid Akram and his son Naveed Akram. Home Minister Tony Burke said the father arrived in Australia in 1998. P9...