01:06Business MattersUS Congress grills big tech bosses on antitrustBBC World Service Duration: 53 minutes Wed 17th Jul 2019, 01:06 on BBC World Service West and Central AfricaAvailable for over a yearListen nowFacebook, Amazon, Apple and Google among those questioned. Show more GenresFactualMoneyFormatsDiscussion & TalkBrandBusiness Matters Source: BBC Online