this is bbc news. i'm shaun ley. the headlines at two. gold medal number 20 for team gb asjoe choong takes top spot in the men's modern pentathlon. bronze on the track asjosh kerr runs a personal best in the men's 1,500m for his medal. boxing gold for galal yafai as he wins in the flyweight division for team gb. success in the pool, too. tom daley earning bronze in the ten metres platform diving — his second medal of the games. britain's matt walls and ethan hayter took olympic men's madison silver — behind denmark in first. in other news, the united states and britain warns their remaining citizens in afghanistan to leave immediately as the taliban continue their advance.