U.S. President Donald Trump says he is seeking a two-way trade with Vietnam that will benefit both the countries. After meeting in Hanoi today with Vietnamese President Tran Dai Quang, Trump told a joint press conference, that for trade to work, all countries must play by the rules. <br/><br/>He said he is encouraged that Vietnam has recently become the fastest growing export market to the United States. He added that they just had a great discussion about American goods and services coming into Vietnam. Quang described his meeting with Trump as fruitful, saying, the president's state visit to Vietnam marks a milestone in Vietnam-U.S. relations. <br/><br/>The two leaders also discussed North Korea and the South China Sea. Trump repeated his warning that North Korea represents a major threat to peace and stability in the region.