A new study shows a correlation between physical movement and mental work.
To study the draft Trans-Pacific Partnership text, senators have to go to the basement of the Capitol and enter a secured, sound-proof room and surrender their cell phones.
The jury already convicted Boston Marathon bomber Dzhokhar Tsarnaev. Now they'll decide whether he will live or die.
The Amtrak passenger train was going more than 100 miles an hour when it derailed north of Philadelphia. Positive train control could have automatically slowed the train down on that stretch of rail.