With news feeds these have an intellectual property owner (news stations that made the recording) and are licensed through the Associated Press. They will charge a per use license of the media for each time that it is used. This can be very expensive as they tend to charge hundreds and in some cases thousands of dollars. Then how do you use these audio clips or photos in the US without facing a possible civil lawsuit for tons of money? We are glad that you asked.
The first this is never use news sources for your media sources. These are copywritten and will cost too much to use. The alternate in the United States is to use Federal Government sites. The images used on this article are actually from www.whitehouse.gov. Why use Federal goverment sites, well the images come from two sources.
The first source is from Federal employees that are taking the photos or audio recordings as part of their work. These can not be copywritten by the US Federal government and are by defauly Public domain. What this means is that you can use these images and not have to worry about copyrights. However, there are some images that will have ownership of the image or audio clip defined.
The only copyright that can be used on a Federal government site except is a Creative Commons Version 3.0. What this means is that you have to give credit of the image in a proper format either directly with the image or on the page. These credits should look like this CC Ver. 3.0 (JohnDoe), John Doe is the person that is the intellectual property owner of the media. Another format to present this is CC by 3.0 JohnDoe. Simply put, you can use a Creative Commons, but have to comply to the standards set for these copyright standards.