A seven-story tenement video in the Bronx partially collapsed on Monday, displacing over 170 people from their homes. The dangerous incident followed complaints to authorities and a subsequent inspection. Experts say people living in older buildings across the country can learn from the circumstances surrounding the unexpected collapse. While the only way to be certain of a building's structural integrity is to have it professionally evaluated, there are some red flags people can watch out for, experts told USA TODAY. Learn what they are at the link in our bio.