The massive helium balloons that will float through New York City for the Macy’s Thanksgiving Day Parade took shape on Wednesday, when they were filled with helium ahead of the big event.

Balloons play a significant role in decorating any celebration, from birthdays and weddings to corporate events and baby ...

the helium expands until it is the width of a football field. Art Thompson:On launch, the balloon is a teardrop shape. But as it goes up into the atmosphere, where you're going into a near-vacuum ...