Stock footage, and similarly, archive footage, library pictures and file footage are film or video footage that may or may not be custom shot for use in a specific film or television program. Stock footage is of beneficial use to filmmakers as it is sometimes less expensive than shooting new material. Examples of stock footage which might be utilized are moving images of cities and landmarks, wildlife in their natural environments and historical footage. One of the largest producers of public domain stock footage is the United States government. All videos produced by the United States military, NASA, and other agencies are available for use as stock footage. Stock footage comes from a myriad of sources; including the public domain, other movies and television programs, news outlets and purpose-shot stock footage. Less