Two federal officers fired their guns during Alex Pretti’s fatal shooting, according to an initial review by the Department of Homeland Security obtained by NBC News. Both agents were placed on ...

The value of the U.S. dollar plunged Tuesday, after President Donald Trump said he was not concerned about the currency's recent drop. "I think it’s great," Trump said, speaking to reporters in Iowa, ...

Health care spending effectiveness is the ratio of an increase in spending per case of illness or injury to an increase in disability-adjusted life-years (DALYs) averted per case. We report US ...

Use this calculator to see how your money's value changed over time — and how much it could change in the future. Many, or all, of the products featured on this page are from our advertising partners ...

Sleep has two phases: non-rapid eye movement (NREM) and rapid eye movement (REM). It also has four stages that repeat in 4 to 6 cycles nightly. Each stage affects your body differently, from light ...