General practitioner examining a patient's hand for signs of rheumatoid arthritis. A breakthrough in cancer and autoimmune disease therapy could unlock a whole new frontier in medicine. Scientists are ...

Checkpoints stand as more than physical barriers against violence. They separate the wanted from the unwanted. They are gateposts meant to divide the good from the bad, to keep chaos away from calm.

With 17.4 million passengers expected over Labor Day weekend, TSA is urging travelers to follow security rules to ease long lines.