Complex sentence: When the September 11 attacks occur, the team is forced to deprioritize the story; but regains momentum when Michael Rezendes (Mark Ruffalo) finds that there are publicly available documents that confirm Cardinal Law was aware of the problem and ignored it.
Split into simpler sentences: When the September 11 attacks occur, the team is forced to deprioritize the story. They regain momentum when Michael Rezendes (Mark Ruffalo) finds that there are publicly available documents that confirm Cardinal Law was aware of the problem and ignored it.