A look at Facebook's month-long rollout of its fact-checking tool and its partners in Mexico, Indonesia, the Philippines, India, and Colombia (Daniel Funke/Poynter)

Daniel Funke / Poynter:
A look at Facebook's month-long rollout of its fact-checking tool and its partners in Mexico, Indonesia, the Philippines, India, and Colombia  —  What started as a pilot project 16 months ago is now one of Facebook's primary weapons against fake news.  —  During his testimony to Congress last week …