Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. In NATO Debut, New Pentagon Chief Aims to 'Internationalize' Iran Effort Reuters WASHINGTON - Acting U.S. Defense Secretary Mark Esper said on Tuesday he aimed to recruit support from NATO allies for U.S. efforts to deter conflict with Iran and "open the door to diplomacy," as he made his international debut as Pentagon chief. Esper emphasized diplomacy over military action as he briefed reporters for the first time since taking the helm of the U.S. military on Monday. The former Army secretary was thrust into the position after the surprise resignation of Patrick Shanahan as acting defense secretary the previous week. Ahead of talks with European defense ministers, Esper said he would tell allies that the United States was not seeking war with Iran. .