MOSCOW. Dec 20 (Interfax) - Washington is concerned about the fact that the Russian State Duma has passed legislation in retaliation for the U.S. Sergei Magnitsky Rule of Law Accountability Act of 2012, which in fact links the fate of childrent to political issues, U.S. Ambassador to Russia Michael McFaul said in a statement on Friday.

"We are very concerned by measures in Federal Law