he vowed to tap the country's oil reserves – the world's largest. Trump now says that he plans to visit the South American country, although no date has been set. His comments, made last Friday, came after US Energy Secretary Chris Wright completed a two-day trip to Venezuela to see how the nation is starting to reopen its oil sector to US companies. Wright's visit came shortly after Venezuela's National Assembly passed a law to allow both private and foreign investment in its oil industry, following two decades of tight state control. In Trump's eyes it is a big business opportunity for the US oil sector. "We're going to be extracting numbers in terms of oil like few people have seen," he said at a news conference in mid-January, after a meeting with energy bosses at the White House. But for the US oil firms that Trump wants to invest heavily in Venezuela, the question is a simple one - do the numbers add up? (BBC)