Russia has said it banned entry to 500 Americans, including former President Barack Obama, in response to sanctions imposed by Washington on Friday. The United States added hundreds more companies and individuals to its sanctions blacklist as it broadened efforts to choke off Russia's economy over the Ukraine offensive. Among those listed were television hosts Stephen Kolber, as well as Jimmy Kimmel and Russia said it blacklisted senators, congressmen and members of think tanks involved in the spread of Russia, phobic attitudes and fakes and the heads of companies that supply weapons to Ukraine.
