A century after the so-called "Spanish flu" pandemic, this season has been one of the worst in a decade. With all the lifesaving vaccines and medicines, why is the flu such a big killer?
As the world gets hotter and sea levels rise, one American island is fighting to stay alive.
Elbow-to-elbow seating, oversized comfort pets, midcabin standoffs — and passengers armed with their smartphones. A new era in air travel has some Americans tweeting mad.