Beijing’s warning shot comes at a time when the United States needs China’s help on issues including the global economic recovery and possible sanctions on Iran. Read more..

By EDMUND L. ANDREWS and EDWARD WONG - The New York Times

Is your drinking water safe? That depends on several factors: the source; the treatment the water receives, if any; and the quality of the pipes in your home. Read more..

By CORNELIA DEAN - The New York Times

After months of anxiety about the Great Recession, a bellwether plant saw enough new orders to justify hiring. Read more..

By PETER S. GOODMAN - The New York Times

A Nobel Peace Prize winner, Dr. Borlaug developed high-yielding crop varieties that helped to avert famines worldwide. Read more..

By JUSTIN GILLIS - The New York Times