the man who dominated international chess in the 1980s and 90s, gary kasparov, has come out of retirementeed and blitz chess tournament in st louis. he managed to get a draw in his first game. kasparov first became world champion in 1985, beating the soviet grandmaster anatoli karpov. next monday, the bongs of london's big ben will fall silent for four years so that repairs can be carried out on its tower. it'll be the longest period its been silenced for since it first chimed in 1859. but big ben will still be heard during important national events such as new year's eve and remembrance sunday. our political correspondent leila natthoo reports. big ben chimes the hour. these chimes have filled the westminster air for more than a century and a half, but soon, a four—year pause, as the great bell, big ben, is silenced, so crucial repairs can be carried out. if you can imagine running your car for 160 years nonstop, 2a hours a day, it will need looking at, so that is what we are doing. we will be able to at this time, because it is such a long stoppage period, check absolutely everything on