President Donald Trump admits a period of difficult transition is inevitable as his trade policies continue to cause upheaval in international markets. And after the end of the Cold War, the world economy became integrated, and globalisation began, but is that at risk now because of the tariffs, trade war and protectionism? Presenter Roger Hearing speaks to Mohamed El Erian, former IMF Deputy Director who is now President of Queens' College, Cambridge, and chief. Also, a general strike against public spending cuts in Argentina has severely disrupted transport systems in the country. All domestic flights have been cancelled; trains and metro services have been suspended in Buenos Aires and other parts of the country.