In the middle of the 20th century, America built a network of roads, bridges, and telecommunications second to none in the world. Yet for several decades, we have underinvested in maintaining and modernizing our infrastructure. Our states are now filled with broken-down roads, closed bridges, mass congestion, and bottlenecks in rail and seaports. Our dilapidated infrastructure costs us time, aggravation, and income. Rebuilding America’s infrastructure for the 21st century will boost jobs, productivity, resilience to floods and storms, and our capacity to innovate.