Romania has come under fire from neighboring Moldova - for agreeing to host elements of the US missile defense shield.
Senior Moldovan politicians – including ex-President Vladimir Voronin – say the move would threaten security and upset the balance of power in the region.
They also say Romania should have consulted Moldova before agreeing to the US proposal.
Bucharest says it is ready to negotiate the details with Washington in order to set up the missile defense system by 2015.