chewing gum burns 11 calories per hour. could lose 11 pounds. i'm courtney for "kids news." and there's a big advantage pares can give tir kids -- makingure they get active least 60 minutes day. studies show th physical activi t only helps kidsay healt, an enhanceimportant il, like concentration ich can improve academicerformance. this means phycal activity can helpour kids in the most important game of all -- life. of the united states of america... and to the republic for which it stands... one nation, under god... indivisible, with liberty... and justice for all. our disabled veterans pledged to sacrifice life and limb to ensure our way of life. now, they deserve our support. find out how you can help disabled veterans in your community. visit dav.org. um]um] ♪[tum] ♪[tum] ♪[tum] ♪[tum] ♪[tum] ♪[tum] [phone ring,] car brakes hard [phone ring] [car crash] glass shatters [sirens] this video was subscholars program.ntthroy for more information on teen safety visit driversedge.org. >> during ancient times, two cities grew up

chewing gum burns 11 calories per hour. , you could lose 11 pounds. i'm courtney for "kids news." >> during ancient times, two cities grew up on opposite sides of the mighty danube river in central europe. nicole tells us how a storm helped change history. >> budapest is the capital of hungary, but it wasn't always one city. the river danube divided buda and pest until a terrible storm led to the building of a bridge. the story goes that count széchenyi's father fell ill here on the pest side. the count was on the other side of the river, the buda side. by the time the count got across by boat, his father had died. he had even missed his father's funeral. the count took on the task of raising money for this bridge to be built so people would always be able to cross the river. called the "chain bridge," because its cables look like bicycle chains, it was completed in the mid-1800s. a few years later, the cities of buda and pest were officially united, and for good measure, they threw in a third neighboring city -- obuda. it h