Earlier this month, the Corporation for Public Broadcasting announced a $4.1 million grant to American Public Media to expand its network of citizen sources that help provide local news coverage.

According to the announcement, Corporation for Public Broadcasting’s investment will add new citizen sources to American Public Media’s Public Insight Network, a Knight-funded program that provides journalists with the tools and training to tap its growing network of sources to produce high-quality journalism.

The grant will allow the network to expand to an additional 50 public media newsrooms which will better serve communities across broadcast, online and mobile platforms:

“This expanded network of informed citizens will broaden the size and diversity of sources that inform public media journalism, providing reporters with new and different perspectives to help promote greater accuracy and transparency in their coverage.”

Currently, American Public Media is the second largest producer and distributor of public radio programming and the largest owner and operator of public radio stations in the country.

Almost 800 stations carry American Public Media’s 20+ national programs. It reaches 26 million listeners each week.