Iran dominated talks during Trump's 2-day visit to Beijing, China, which wrapped up with a state luncheon
Summit’s second day was a test of whether talks could yield a concrete deal
The summit projected an air of friendship between the governments and business communities of two rival superpowers
Chinese leader raises issue that clouds Trump’s hopes for ‘best summit ever’
Xi Jinping warned Donald Trump that mishandling the Taiwan issue could put the U.S. and China on a collision course