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Suicide attack, a software engineer crashes plane into IRS building in Austin, Texas – NBC (video)

Frustration and rage at the IRS and feelings of being treated unfairly, suicide factors.

Officials: Plane crash pilot acted alone - Part 1

A software engineer with an ongoing beef with the Internal Revenue Service apparently launched a suicide attack Thursday morning when he crashed a plane into an IRS building in Austin, Texas.

Act of desperation shocks Austin - Part 2

Teas officials are continuing to investigate the apparently deliberate plane crash early Thursday that injured more than a dozen people, two seriously.

Joe Stack's final act Part 3

As investigators and journalists raced to piece together a picture of the suspected pilot who crashed into a Texas building early Thursday, a story of growing frustration and rage emerged.