Alva Review-Courier -

NEW YORK (AP) — YouTube says it's cracking down on conspiracy videos, though it's scant on the details.

Conspiracy videos abound on YouTube, whether it's about the Earth being flat or school shootings being staged. YouTube, its parent Google, Facebook and Twitter are all facing challenges with the spread of misinformation, propaganda and fake news.

YouTube CEO Susan Wojcicki said at a conference Tuesday that the company will include links to the online encyclopedia Wikipedia to try to debunk videos espousing conspiracy theories.

But Wikipedia itself has had its share of credibility issues, as...