Bridge (IMAGE) U.S. National Science Foundation Caption Americans rely upon essential goods and services, such as clean water, electricity and transportation, provided by critical infrastructure, as well as the societal functions they support, such as healthcare. These systems are becoming increasingly interconnected, while our demands on them and the hazards they face grow. Credit FEMA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.