Dhaka, May 31 -- The US State Department has put student visa processing on hold following orders from Secretary of State Marco Rubio - the latest in a series of measures by the Trump administration aimed at tightening immigration screening.The decision, which requires US diplomatic missions to pause interview appointments for new student and exchange visa applications, comes amid ongoing tensions between the Trump administration and higher-education institutions, in particular Harvard University."The Department is conducting a review of existing operations and processes for screening and vetting of student and exchange visitor (F, M, J) visa applicants, and based on that review, plans to issue guidance on expanded social media vetting for ...