Hello, this is David Austin with the BBC News.The United States has suspended two more military exercises with South Koreaas part of a commitment given by President Trump to the North Korean leader Kim Jong-un.They were scheduled to take place over the next three months. Sophie Long reports.President Trump's announcement that the US and South Korea would suspend what he called provocative and expensive war gameswas a surprise concession following the Singapore summit.A week later, a major joint military exercise due to take place in August was put on hold,and now two Korean-American marine exchange training exercises will also be postponed indefinitely.The Pentagon said that the US Defense Secretary James Mattis has suspended selected exercisesto support implementing the outcomes of the Singapore summit.The South Korean Defense Ministry said there could be additional measures should North Korea follow suit with productive cooperation.Media reports in the United States say its navy is drawing up plans to build detention centers on military basesin an attempt to tackle the migration crisis on the border with Mexico. Here's Warren Bull.According to Time Magazine, the plans are contained in a memo drafted for the US navy secretary's approval.It outlines proposals to build what it described as temporary and austere tent citiesto house 25,000 migrants at abandoned airfields in California, Alabama and Arizona.The estimated cost of these centers, it says, is 233 million dollars over six months.