JUST IN: 🇺🇸 US issues warning to all Americans in the following countries to exercise caution as Saudi Arabia and Yemen's Houthis escalate attacks: 🇮🇷 #Iran 🇮🇶 #Iraq 🇴🇲 Oman 🇯🇴 Jordan 🇰🇼 Kuwait 🇧🇭 Bahrain 🇱🇧 Lebanon 🇸🇦 Saudi Arabia