Experts say US backing armed groups could ‘open up a hornet’s nest’; son of Ayatollah Khamenei tipped to succeed his father as leader. What we know on day six Middle East crisis – live updates Experts say US backing armed groups could ‘open up a hornet’s nest’; son of Ayatollah Khamenei tipped to succeed his father as leader. What we know on day six Middle East crisis – live updates The US-Israel war on Iran has entered a sixth day, with US forces reportedly ready to provide air support to