01:06Business MattersUS Defence Secretary Jim Mattis ResignsBBC World Service Duration: 53 minutes Fri 21st Dec 2018, 01:06 on BBC World Service OnlineAvailable for over a yearListen nowUS Defence Secretary Jim Mattis will be retiring at the end of February 2019. Show more GenresFactualMoneyFormatsDiscussion & TalkBrandBusiness Matters Source: BBC Online