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Colin Powell was hailed as a hero for a swift and speedy U.S. victory in the Gulf in 1991. But his reputation suffered from his flawed presentation in advance of the second Iraq war 12 years later.

While Israeli-Palestinian conflict continues to bring violence to the Gaza Strip, San Diegans on both sides have taken to the streets to demonstrate.

With much of the U.S. sweltering this summer, even avid runners, hikers and bikers are wilting. We've got 10 strategies from experts on how to exercise without keeling over.

With much of the U.S. already sweltering this summer, even avid runners, hikers and bikers are wilting. We've got 10 strategies from experts on how to enjoy hot weather exercise without keeling over.

A medical team in New York City says it has performed the first complete surgical transplant of a trachea. These kinds of transplants are one of the last big transplant challenges.

The Department of Veterans Affairs has partnered with the Warrior-Scholar Project, a non-profit group that runs the camps at major universities around the U.S.

Sepsis is one of the most common causes of death for hospitalized patients. The search for an effective treatment has been frustrating.

To survive the recall election, Gov. Gavin Newsom must have the support of California's Latino voters. But in Imperial County, many of those voters stayed home or shifted toward Donald Trump in 2020.

More contagious than other variants, and maybe more likely to cause severe disease, Delta is spreading so fast in the U.S. it could cause another surge this summer or fall, according to new research.

The United Kingdom has become the first country to approve a thoroughly tested COVID-19 vaccine. A British regulatory agency approved the Pfizer/BioNTech vaccine on Wednesday.