United States Secretary of State Mike Pompeo and Defence Secretary Jim Mattis arrived in New Delhi to participate in the 2+2 dialogue with Indian Foreign Minister Sushma Swaraj and Defence Minister Nirmala Sitharaman on September 6. They discussed several bilateral defense purchases, as well as India’s oil purchases from Iran, India’s purchases of Russian S-400 missile systems which are subject to U.S. sanctions under the CAATSA and U.S. regulations for H-1B visas.