The information timeline can help you determine which types of sources to look for based on the type and depth of information you need: Once you know which type of sources you want to look for, you can more efficiently decide where you need to look.
As an event develops, information about it is generated and disseminated. The first reports show up on the Internet, television, and radio. First reports usually focus on the quick facts: who, what, where. As time passes, information filters through different types of resources, with the level of coverage increasing and becoming much more detailed and analytical.