Is Poland inviting a NATO invasion by defying the US over it's Polish Missile Shield plans?

Missile Defenseless: Poland slams US power play, plans own shield - YouTube

Published on Aug 8, 2012 by RussiaToday

Poland could make a break from its military protectors in the US, with the country's President suggesting the development of a missile defence shield all of its own. The Polish leader said a deal to allow parts of America's planned system on its territory left security at the mercy of policy shifts in Washington.