President Barack Obama warned Monday there would be no deal on raising the government's debt limit if Republicans don't compromise and said he would not sign a short-term extension — raising the stakes on volatile negotiations with the clock ticking toward a Aug. 2 deadline.

The world's top emerging countries banded together Monday to help fight diseases in the poorest countries, pledging to transfer technologies to the developing world to help supply cheap and effective drugs.

America's cities are beginning to grapple with a fact of life: People are getting old, fast, and they're doing it in communities designed for the sprightly.

President Barack Obama hasn't given up on getting congressional leaders to accept a $4 trillion debt reduction deal that Republicans have rejected for its tax increases and Democrats dislike for its cuts to programs for seniors and the poor, administration officials said hours before talks resumed Sunday.