BEIJING (AP) — President Barack Obama has encouraged China's president to join the U.S. in addressing some of the world's biggest issues, including climate change and nuclear proliferation. Earlier, Obama fielded questions from university students in Shanghai.

NEW YORK (AP) — A panel of experts says mammograms are causing women being screened for breast cancer to have too many false alarms and unneeded biopsies. The panel is recommending that women wait until 50 to get mammograms and then only every two years. The American Cancer Society says it stands by its recommendations of regular mammograms beginning at age 40.

CHICAGO (AP) — Not having insurance apparently doubles the chance trauma patients getting emergency treatment will die. That's according to researchers at Harvard, who compared trauma patients with and without insurance. The study, in the November issue of Archives of Surgery, comes as Congress debates the expansion of health insurance coverage to millions.

MELBOURNE, Australia (AP) — Doctors in Australia say twin girls joined at the head have been successfully separated after 25 hours of surgery. The two-year orphans from Bangladesh now face hours of reconstructive surgery.

CHICAGO (AP) — An FBI file released to a New York media outlet shows the agency kept watch on the late Chicago author Studs Terkel for decades. The file, obtained by NYCity News Service in a lawsuit, also shows Terkel once applied for a job with the FBI but was turned down.