Kansas City team takes first NFL Championship since their triumph over the Minnesota Vikings in 1970

Spot to air during Sunday game, featuring US scientist Bill Nye and 18-year-old US astronaut-in-training Alyssa Carson

Vlogger Meir Kalmanson says his past as a bullied Jewish kid inspired him to start the initiative 3 years ago so that 'others don't feel that way'

US presidential hopeful's campaign spot will feature bereaved mother calling the situation a 'national crisis'; Trump intends to reveal his own ad later this week

Kansas City Chiefs lineman says his parents didn't allow him to play American football until after his bar mitzvah preparations