claims that facebook glossed over warnings its messaging app instagram could be having a harmful effect on many teenagers. but first... borisjohnson has sacked several senior government ministers in a major reshuffle of his cabinet. dominic raab, who was on holiday when the taliban marched into kabul, has been replaced as foreign secretary. thatjob will now be taken on by the former international trade secretary, liz truss. our political editor laura kuennsberg reports. nerves all round. who's out, and who's in, prime minister? l reshuffles matter, who the boss wants in, and who the boss wants out. to start, where would he end up? the black belt foreign secretary who is in charge in his grecian holiday after the fall of kabul. after