We are learning more about the assassination attempt on former president Donald Trump. Trump was injured in the attack, which killed one spectator and injured two others. The gunman was also killed. On Sunday, U.S. President Joe Biden ordered an independent review of security measures leading up to the attack – and appealed for unity. In the wake of those shocking events, there are now more questions about how the Republican National Convention (RNC) will unfold as it kicks off Monday in Milwaukee. Meanwhile, the U.S. Secret Service is under scrutiny over the apparent security lapse at the Trump rally in Pennsylvania. And, while world leaders have widely condemned the attack on Trump, the tone and focus of their statements has differed depending on their political stances.