The USA is the stronghold of English-language rap, so it is something of a shock that despite topping the chart in territories where English isn't even the first language, Dr Dre's long-awaited third album Compton falls short of the summit in the country, debuting at number two behind country star Luke Bryan's Kill The Lights. It is also surprising that rap deity though he is, Dre has never had a number one album in America - his 1992 debut Chronic ...