The Kremlin warned Monday of possible retaliation against the United States for sanctions imposed on two major companies in the Russian defense industry. "We cannot rule out certain negative consequences for bilateral relations" between Russia and the United States, presidential administration spokesman Dmitry Peskov said Monday. "This was an unfriendly act toward Russia, and it was not done in a spirit of cooperation." Rosoboronexport chief Sergei Chemezov suggested Monday that a proposed deal for U.S. companies to deliver up to $1 billion in Russian military hardware to Afghanistan and Iraq could be jeopardized by the sanctions, Interfax reported. Meanwhile in...