Poll shows 57% expect at least one country to leave the euro this year.

Poll shows 57% expect at least one country to leave the euro this year.

G-20 warns European government that debt problems still threaten global growth.

G-20 warns European government that debt problems still threaten global growth.

Leaders look for IMF assistance as concerns about Spain mount.

Leaders look for IMF assistance as concerns about Spain mount.

U.S. may take back role as main engine for global growth as China, Europe decelerate.

Borrowing costs could surge for other indebted nations.