Starting with 2015 the American military base with terrestrial interceptors in Romania will be functional, followed up by the one in Poland in 2018.

They will be part of a whole anti-missile system, along with satellite, ground and sea radars. The shield is meant to protect Europe from a possible attack from Iran, and not only. Yet it will also have considerable effects on the balance of military power on the Eurasian continent. 

What do you think of the new American bases in Europe, is it a sign of concern or will it strengthen the regional security and stability on a long term?