While authorities investigate and Americans seek answers in the wake of Sunday’s massacre in Las Vegas, Australia is offering to help the U.S. reshape its gun laws. Following a mass shooting in Port Arthur in 1996 that left 35 people dead, Australian officials enacted major gun control legislation. Now officials are offering to help America do the same, according to a cable news station based in Singapore. “What we can offer is our experience,” said Australian Foreign Minister Julie Bishop, talking about her country’s gun buyback program and subsequent ban on semi-automatic and automatic weapons. “But at the end of...