a landmark security pact that will involve building a fleet of nuclear—powered submarines for the australian navy. there are concerns about china's growing military presence in the indo—pacific region. four us gymnasts, including america's most successful, simone biles, have testified at a senate committee hearing over the fbi's failures in its sex abuse investigation of the former team doctor larry nassar. the british prime minister, borisjohnson, has sacked several senior government ministers in a cabinet reshuffle of his cabinet. dominic raab is replaced as foreign secretary by liz truss. shamima begum, who left the uk as a teenager to join the islamic state group in syria, has begged to be allowed to return to the uk, insisting she could help in the fight against terror.