Authorities this weekend announced they had foiled three potential mass shootings after arresting three men in different states who expressed interest in or threatened to carry them out. Here's what we know about them.

Authorities this weekend announced they had foiled three potential mass shootings after arresting three men in different states who expressed interest in or threatened to carry them out. Here's what we know about them. https://t.co/0KIiKWka7D

— CNN (@CNN) August 18, 2019