In today's episode of Trending Middle East, Qatar's Prime Minister Sheikh Mohammed bin Abdulrahman will meet US President Donald Trump at the White House, as efforts to mediate in the US-Iran war face renewed challenges. Mr Trump has said that further strikes on Iran are unlikely if negotiations succeed, but US forces remain on alert. Gulf countries have signed a milestone agreement to build a 2,100-kilometre railway network connecting the region from Kuwait to Oman.