Describe the Capture of Bukhara as accounted by Juwaini. 

Juwaini, a late-thirteenth-century Persian chronicler of the Mongol rulers of Iran, carried an account of the capture of Bukhara in 1220. After the conquest of the city, Juwaini reported, Genghis Khan went to the festival ground where the rich residents of the city were and addressed them: ‘O’ people know that you have committed great sins, and that the great ones among you have committed these sins. If you ask me what proof I have for these words, I say it is because I am the punishment of God. If you had not committed great sins, God would not have sent a punishment like me upon you’… Now one man had escaped from Bukhara after its capture and had come to Khurasan. He was questioned about the fate of the city and replied: ‘They came, they [mined the walls], they burnt, they slew, they plundered and they departed.’