Storm chaser Jeff Gammons is documented in the Imax film 'Stormbound,' directed by Miko Lim and premiering at SXSW and internationally at CPH:DOX.

Tornadoes are some of the most fearsome phenomenon on the planet. It takes a very special kind of person to actively seek them out. Sean Casey, of Discovery Channel’s “Storm Chasers,” is one of them, ...