Deflated, the balloons look like giant party balloons. As they fill with helium, they begin to take shape — two white, upside-down teardrops bobbing gently in the spring air.

Deflated, the balloons look like giant party balloons. As they fill with helium, they begin to take shape — two white, upside-down teardrops bobbing gently in the spring air.

One woman thinks back to the shortage of miniature flags after the September 11 attacks. A teacher describes a giant balloon arch she’d bought for a school event. At Party City in Maryland, cashier ...

Museums Exhibits This immersive balloon museum in NYC features a giant ball pit with a pool party illusion The Balloon Museum's 'Let's Fly' exhibit will run through Jan. 14 in NYC ...

The NASA-backed Nationwide Eclipse Ballooning Project puts students in charge of a bold scientific endeavor to study the April 8 total solar eclipse.