A third of international travellers say they are less likely to visit the US if proposals to scrutinise social media accounts are brought in, according to a survey. It suggests proposals to screen visitors' social media accounts and family histories - as announced last month - could cut tourism spending by $15bn (£10.8bn) and impact 157,000 jobs. US Customs and Border Protection (CBP) has proposed collecting five years' of social media information from travellers from selected countries -