OSINT is an often overlooked and underutilized form of intelligence.  An understanding for what the open-source has to offer is best gained through defining OSINT.  The following image from CIA.gov puts it best:

from CIA.gov

from CIA.gov

Open-source has an abundance of data to be applied in creative ways to bolster international security, promote  economic enhancements, and provide early warning for a wide variety of disasters. Spending some time going over the article in its entirety would be worth while:  https://www.cia.gov/news-information/featured-story-archive/2010-featured-story-archive/open-source-intelligence.html

Making certain you are knowledgeable is imperative in a democracy.  Check back for updates and additions to this section, and stay frosty.

View the following videos to enhance your understanding of open-source intelligence.

Sometimes classified information becomes open source intelligence like the PRISM program at NSA