Mitchell Silk, an expert on China from New York, appointed by Senate as assistant secretary of the Treasury for International Markets

Over 200 Americans dead, 14,000 infected as New York City emerges as nation's epicenter; global deaths surpass 11,000; China claims no new infections for 3rd straight day

Iran's Atomic Energy Organization and its head Ali Akbar Salehi face sanctions, but foreign companies working on Tehran's civilian nuclear program are still exempt

New restrictions come on 40th anniversary of attack on US embassy, and as Iran ups enrichment, targeting senior military officers, chief justice, and advisers to supreme leader

Foreign Minister Israel Katz says new penalties are 'the right way to counter Iranian aggression' after Washington and allies target Revolutionary Guards Corps, terror group

Sanctioned entities include firms that support Iranian Basij militia, 4 Hezbollah operatives running terror group's operations in Iraq

Experts say measure looks like aimed at gathering intelligence and could increase burden for humanitarian trade, amid accounts of Iranians going without vital medicine

Embassy says assistant secretary for terror financing will urge Beirut government to disassociate from 'destabilizing' Iran-backed group

Measures touted as toughest 'ever' by Trump are derided in Tehran as proof of 'how empty their hands are'

Measures against central bank come after administration vowed response to blasts blamed on Tehran that damaged Saudi Arabia's oil infrastructure