LONDON (Reuters) - Bruce Springsteen secured his ninth UK number one album on Sunday with "Wrecking Ball", an often angry look at economic hardship, inequality and the fallout from the financial crisis. The 62-year-old, nicknamed "The Boss," first topped the UK album charts more than two decades ago, with the global hit "Born in the U.S.A." Described by one reviewer as "his angriest and most overtly political collection yet", Springsteen's latest release mixes familiar anthemic rock with gospel, Irish folk music and even hip hop. ...