Just say "no" to Bush
By Adam Easton
BBC News, Warsaw
The initial talks will last for two or three days, focusing on the legal aspects of basing US forces in Poland.
The US wants Poland to host 10 interceptor rockets capable of destroying long-range ballistic missiles fired from the Middle East.
Russia says the US plan would seriously destabilise global security.
Broader political discussions with Poland will take place at the end of the month.
The Polish government has said it wants to host the US base given the right conditions, despite growing public opposition.
Poland is a staunch US ally but it does not want to be taken for granted.
Polish officials were annoyed when the Americans sent their first official note on the base with a draft reply already attached. The government says any agreement must improve national security.
Ideally, the Poles want a new formal security partnership with the Americans and perhaps the deployment of batteries of short-range missiles.