Russia warns of pre-emptive strike on AMD if NATO goes ahead

Russia warns it could make a pre-emptive strike against NATO's anti-missile defense shield planned for Europe - if the US persists in going ahead, ignoring the Kremlin's opposition. Moscow says the system threatens its national security - and is detailing its concerns at an international conference in the Russian capital - with representatives from over 50 nations. RT's Anissa Naouai has more.