Given the rationale, provide a reasonable question and answer. Step-by-step reasoning process: To answer the question, consider the following: Frontman and chief songwriter Billie Joe Armstrong told Q magazine, in May 2009: "It brings up 21st Century Breakdown in a lot of ways, and the 21-gun salute for someone that's fallen, but done in an arena rock' n' roll sort of way."
 The question and answer:
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"21 Guns" addresses the topic of patriotism. Frontman and chief songwriter Billie Joe Armstrong told Q magazine, in May 2009: "It brings up 21st Century Breakdown in a lot of ways, and the 21-gun salute for someone that's fallen, but done in an arena rock' n' roll sort of way."

Meaning of the song 21 guns by green day?
The answer is 21st Century Breakdown in a lot of ways , and the 21 - gun salute for someone that 's fallen , but done in an arena rock ' n ' roll sort of way
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