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After wrapping a concert in Columbia, S.C. on September 19, 2008, DJ AM and Travis Barker boarded a Learjet 60 - all four tires then exploded as the plane zoomed down the runway at 150 mph...

The crash killed four people, Barker and AM were left seriously injured and the DJ later died of a drug overdose after getting hooked back on prescription meds.

Now the National Transportation Safety Board held a long meeting in Washington earlier today to discover the root of the problem: Under-inflated tires, says the investigators.

The NTSB also insists that this is becoming a widespread problem on business jets as well.

Hopefully airlines will take action so this doesn't happen again!