| Released=November 21, 2016
# [[The Catalyst|The Catalyst (2010 Demo)]]
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| Recorded=2010
| Released=November 21, 2016
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| Released=November 17, 2010
...d in 2002 during the ''[[Meteora]]'' sessions. It was released in November 2010 on the ''[[LP Underground X: Demos]]'' CD.
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| Released=November 17, 2010
...when Linkin Park was still called "[[Xero]]". It was released in November 2010 on the ''[[LP Underground X: Demos]]'' CD. This track and "[[Pods]]" share
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| Released=November 17, 2010
...ring the ''[[Minutes To Midnight]]'' sessions. It was released in November 2010 on the ''[[LP Underground X: Demos]]'' CD.
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| Released=November 21, 2016
# [[The Catalyst|The Catalyst (2010 Demo)]]
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2 KB (270 words) - 22:06, 21 February 2024
| Released=November 21, 2016
# [[The Catalyst|The Catalyst (2010 Demo)]]
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2 KB (324 words) - 22:07, 21 February 2024
| Released=November 17, 2010
...d in 2002 during the ''[[Meteora]]'' sessions. It was released in November 2010 on the ''[[LP Underground X: Demos]]'' CD.
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| Released=November 17, 2010
| November 17, 2010
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| Released=December 20, 2010<!-- ||}} -->
| Recorded=2006-2010
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| Recorded=2008 - 2010
| Live debut=[[Live:20100914|September 14, 2010]]
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| Released=November 15, 2011
...clusive media, contests, etc. - Newswire - Linkin Park Live], February 14, 2010</ref>
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| Recorded=2008 - 2010
| Live debut=[[Live:20100914|September 14, 2010]]
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| Released=August 18, 2010
| This=''[[A Decade Underground]]''<br>(2010)
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| [[Live:20011113c|November 13, 2001]]
| November 17, 1993
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| Date=[[Live:20101110|November 10, 2010]] <br>
[[Live:20101111|November 11, 2010]]
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| Date=[[Live:20101215|December 15, 2010]]
...k Underground Fan Summit took place in Sydney, Australia on December 15th, 2010.
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| Recorded=[[Live:20101107|2010.11.07 Madrid, Spain]]
...three shows before they jumped right over to Europe at the end of October 2010.
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| Released=November 17, 2010
The song was released on the LP Underground X CD on November 17, 2010. In the LPU newsletter, Brad said the following about "What We Don't Know",
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| November 17, 1993
*Recorded Live at Sony Music Studios, New York City, NY; 17 November 1993.
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