Haiti (IMAGE) U.S. National Science Foundation Caption In a pre-earthquake photo, a GPS receiver and antenna sit atop a roof in Port-au-Prince, Haiti. Credit Purdue University/Eric Calais 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.