Engineer Crashes Plane Into Federal Tax Building

In this aerial view, smoke billows from a seven story building after a small private plane crashed into a building that houses an office of the federal tax agency in Austin, Texas on Thursday Feb. 18, 2010. (AP Photo/Austin American Statesman, Alberto Martinez)

In this photo provided by Trey Jones, smoke billows from a seven story building in Austin, Texas after a small private plane crashed into it Thursday Feb. 18, 2010. (AP Photo/Trey Jones)

In this photo provided by Trey Jones, smoke billows from a seven story building in Austin, Texas after a small private plane crashed into it Thursday Feb. 18, 2010. (AP Photo/Trey Jones)

Firefighters work on a blaze at a house listed as belonging to Joseph Stack in North Austin, Texas on Thursday Feb. 18, 2010. Stack crashed his small plane into an office building that houses federal tax employees on Thursday, setting off a raging fire. Authorities in Austin would not comment on the house fire. (AP Photo/Austin American Statesman, Jay Janner)

A firefighter on a ladder works on putting out a fire at a seven story building after Joseph Stack crashed a small private plane into the building that houses the Internal Revenue Service in Austin, Texas on Thursday Feb. 18, 2010. (AP Photo / Austin American Statesman, Ralph Barrera)

Austin firefighters work in the smoke of an Internal Revenue Service building fire after a small plane crashed into it Thursday, Feb. 18, 2010, in Austin, Texas. (AP Photo/Harry Cabluck)

This undated photo provided by Pam Parker on Thursday, Feb. 18, 2010 shows Joseph Stack. Officials identified Stack as the pilot of a small plane that crashed into an Austin, Texas office building containing nearly 200 IRS employees. (AP Photo/Courtesy of Pam Parker)

A firefighter walks inside a damaged building, Thursday, Feb. 18, 2010, in Austin, Texas. Authorities said that Joseph Stack flew his small plane into the building that housed several employees of the Internal Revenue Service. (AP Photo/Tony Gutierrez)

Vehicle traffic is shown on U.S. Highway 183 as a damaged building is shown at rear, Thursday, Feb. 18, 2010, in Austin, Texas. Authorities said that Joseph Stack flew his small plane into the building that housed several employees of the IRS. (AP Photo/Tony Gutierrez)

A firefighter walks on one of the midlevel floors of an office building that was severely damaged when an small aircraft was flown into it, Thursday, Feb. 18, 2010, in Austin. Authorities said that Joseph Stack flew his small plane into the building that offices several employees of the Internal Revenue Service. (AP Photo/Tony Gutierrez)

Investigators with the Austin Police, FBI and other departments are shown, foreground, as what remains of a small aircraft is shown at rear, inside one of the lower levels of an office building, Thursday, Feb. 18, 2010, in Austin. Authorities said that Joseph Stack flew his small plane into the building the offices several employees of the Internal Revenue Service. (AP Photo/Tony Gutierrez)

In this photo provided by Trey Jones, smoke billows from a seven story building in Austin, Texas after a small private plane crashed into it Thursday Feb. 18, 2010. (AP Photo/Trey Jones)