A prime starting point for any research, this Web site can help you whether you're trying to find out the number of police officers killed in the line of duty this year or the number of students enrolled in college. This site is also easy to navigate, with links grouped by topic category on the homepage. While some of the links are somewhat outdated, most provide accurate and useful information, and at the very least, offer a stepping off point for further research. Be sure to scroll past the â€œsponsored linksâ€? that can be found throughout the site. They may look like data-filled links, but are only glorified advertisements.