Agnes devastated Maryland river towns: 'It was extraordinary' (Part 1)

Fifty years later, Hurricane Agnes remains the greatest flood in the Mid-Atlantic, both in coverage and magnitude. Agnes moved killed more than 100 people, becoming one of the worst disasters in U.S. history. It caused more than $3 billion dollars' worth of damage across 12 states, which today would equal around $21 billion. Adjusted for inflation, it's still one of the costliest storms in the nation's history. Between Virginia, Maryland, Washington, D.C., and West Virginia, 305 homes were destroyed and more than 11,000 homes sustained damage. Five decades later, 11 News looks back at the damage and the progress made -- from weather forecasting technology to flood mitigation steps.