President Donald Trump and first lady Melania Trump have been traveling in Asia this week as part of the president’s five-nation tour of the region. The trip, a dozen days long, is Trump’s longest foreign trip to date. It’s also the longest that any United States president has spent in Asia since George H.W. Bush traveled through Asia for 12 days in 1991. So far, Trump has visited Japan, South Korea and China, as well as Vietnam, where he is attending the Asia-Pacific Economic Cooperation summit. He’ll continue on to the last leg of his trip in the Philippines this weekend.