Conversation so far:
What happened in 2009?
Pendulum once again toured Europe in 2009.
What countries did they tour?
CANNOTANSWER.
What did they do after their tour of Europe?
CANNOTANSWER.
Are there any other interesting aspects about this article?
In January 2011, Pendulum released a Deluxe Edition of Immersion via iTunes which contained the album's original 15 tracks.

Question: Where there any hot singles?
Self-contained rewrite: Where there any hot singles by Pendulum?