Problem
President Biden announced on February 24, 2022, additional sanctions against Russia, specifically aimed at its financial sector. According to a White House fact sheet, the assets of Russia's largest banks will be cut off from the U.S. financial system and some of its largest enterprises, including Gazprom, will be frozen out of American financial markets. With Russian troops streaming into eastern Ukraine after Moscow recognized two regions there as independent, the U.S., U.K. and EU have announced sanctions and indicated there could be more to come. Write an essay and talk about how do economic sanctions work? In what forms can sanctions take? Do some research on sanctions imposed on Russia, Iran, and Cuba. Why did U.S. imposed sanctions on those countries and how well such measures work?