Conversation so far:
Can you tell me more about the reformation that took place from 2009-2014 for Blink 182?
Blink-182 appeared for the first time on stage together in nearly five years as presenters at the February 2009 Grammy Awards, announcing their reunion.

Question: What led to them appearing for the first time in five years?
Self-contained rewrite: What lead to Blink-182 appearing for the first time in five years?