narrator: join parents and experts at understood.org. a free online resource about learning and attention issues to help your child thrive. in 1094, the eastern church calls upon the pope in the west to help them fight off the incoming muslim armies. the pope sees this as an opportunity to reunite christians and restore the reign of the catholic church. >> there's a tribal aspect to it, that our tribe is being attacked, just as we still do today, you know, 9/11, somebody attacks the united states, people are lined up at induction