It’s not always easy to understand the underlying technology that makes calls to 911 work, and it’s not always important to understand that technology, just so long as it works when you need it. But what is easy to understand—and important to know–is that if federal funding for technology infrastructure to support the transition from E911 to Next Generation 911 (NG 911) isn’t made available quickly, the underlying technology, and the reliability and accuracy of caller location information that that technology enables, is itself on life support.