The new headquarters of the European Central Bank, ECB, is seen behind barbed wire in Frankfurt, Germany, Tuesday, June 11, 2013. A key ECB program that has been credited with calming t

 

              The new headquarters of the European Central Bank, ECB, is seen behind barbed wire in Frankfurt, Germany, Tuesday, June 11, 2013. A key ECB program that has been credited with calming t
The new headquarters of the European Central Bank, ECB, is seen behind barbed wire in Frankfurt, Germany, Tuesday, June 11, 2013. A key ECB program that has been credited with calming the 3 1/2 year-old euro debt crisis faced a legal challenge Tuesday in Germany's highest court. The Federal Constitutional Court in Karlsruhe is considering arguments against the ECB's offer to buy government bonds and lower borrowing costs for indebted countries. Opponents of the bond-buying program say the program oversteps the ECB's mandate, which forbids it from financing governments.The ECB moves into the building in 2014. (AP Photo/Michael Probst)