WATCH: Father and son reunited after Oklahoma storm

AUDIO: Tornado survivor gives first-hand account of hiding in movie theater during storm

Amanda Danskin was inside the Moore Warren Theater when the tornado hit

Expert: Homes Can Be Cheaply Tornado-Proofed

Clips and straps used to keep walls bolted to the roof and the foundation of a home cost about one dollar each

How a $4.5 million network of 181 sirens helped save lives in Oklahoma twister

The coverage area of the new system is nearly four times more than the previous one