Russian President Vladimir Putin said today that Moscow will retaliate if the United States takes measures against Kremlin-controlled media group RT.<br/><br/>Washington is pressuring the channel to register as a "foreign agent", which would force it to disclose personal information of employees and those interviewed.<br/>'<br/>Speaking at the annual Valdai Club meeting of international experts in Sochi, Mr Putin said Moscow would take<br/>similar actions against US media in Russia, if legal steps are taken to limit RT's activities in the United States.<br/>'<br/>RT this month said the channel was given a deadline of October 17 to register under the Foreign Agents Registration Act. <br/><br/>The Russian Justice Ministry also sent warning letters to "a number of US media operating in Russia" warning them of the "unacceptability of breaching Russian law".<br/>