If a fire starts in your high-rise apartment building, you could have less than three minutes to make decisions about ways to safely escape. While navigating through an apartment, hallways or even stairwells, it’s critical to make sure you close doors where possible to avoid blocking potential exit routes. Watch footage from our research experiments using 3D models that show how fast fire and smoke can spread when doors are left open. Make sure to share this video with family and friends as a re