New Delhi, May 23 -- The US has sharply curtailed a key immigration route used by hundreds of thousands of Indian professionals, directing officers to approve green card applications filed from inside the country only in "extraordinary circumstances" - latest in a series of restrictions that have, according to new data, driven down H-1B visa registrations for people from all nations. The drop in registrations for the popular visa category is 38.5%, a reflection of the Trump administration tough-on-immigrants policy that has reshaped the prospects of Indian workers who make up an estimated 71% of all approved H-1B applications.P13...