Conversation so far:
When was Slipknot (band) third hiatus?
The band toured in support of the album throughout 2008 and continued until October 31, 2009, resulting in Slipknot's third hiatus.
Why did Slipknot (band) take their third hiatus?
During the hiatus, several Slipknot band members focused on respective side projects

Question: What projects did they work on?
Self-contained rewrite: What side projects did the members of Slipknot work on?