The United States raises efforts against what it calls Iran's threats.
President Donald Trump sends an additional 1,500 troops to the Middle East.
He also passes Congress to sell billions of dollars of weapons to Iran's rivals, Saudi Arabia and the United Arab Emirates.
Iran's neighbor, Iraq, promises support and offers to mediate.
At the same time, Iraq is cautious about pushing relations with the Americans.
Andreas Kreig – Assistant Professor, Defense Studies, King & # 39; s College London
Sami Nader – Director, Levant Institute for Strategic Affairs
Robert Gutsche – Associate Professor, Lancaster University
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