Nick Snow Washington Editor Sanctions by the US government and other international organizations, and difficulty conducting business with Iran have made several foreign firms withdraw from that country's oil, gas, and petrochemical arena, the Government Accountability Office said on Aug. 3. Updating a 2010 report at the request of the US Senate Foreign Services Committee, the congressional watchdog service reviewed reliable open sources and identified 16 such firms that had commercial activity in Iran from January 2010 through May of this year, including 2 entities not listed in its earlier report. It also found that 20 of the 41 firms listed in the 2010 report declared in their public re...