epa02040287 Firefighters view the wrecked tail section of a single engine airplane at the Echelon III building in Austin, Texas, USA, 18 February, 2010. The Echelon complex houses the Internal Revenue Service offices for the Austin area. Joseph Andrew Stack, a Georgetown, TX resident is suspected of flying the plane into the side of the building. Stack had recently had received notice that the IRS was taking control of his assets for back taxes. EPA/BOB PEARSON

epa02040182 Bystanders watch as firefighters control the fire at the Echelon III building in Austin, Texas, USA, 18 February, 2010. The Echelon conplex housed the Internal Revenue Service offices for the Austin area. Joseph Andrew Stack, a Georgetown, TX resident is suspected of flying a single-engine plane into the side of the building. Stack had recently had received notice that the IRS was taking control of his assets for back taxes. EPA/BOB PEARSON

epa02040180 Bystanders watch as firefighters control the fire at the Echelon III building in Austin, Texas, USA, 18 February, 2010. The Echelon complex houses the Internal Revenue Service offices for the Austin area. Joseph Andrew Stack, a Georgetown, TX resident is suspected of flying a single-engine plane into the side of the building. Stack had recently had received notice that the IRS was taking control of his assets for back taxes. EPA/BOB PEARSON

epa02040175 Firefighters work to control the fire at the Echelon III building in Austin, Texas, USA, 18 February, 2010. The Echelon complex houses the Internal Revenue Service offices for the Austin area. Joseph Andrew Stack, a Georgetown, TX resident is suspected of flying a single-engine plane into the side of the building. Stack had recently received notice that the IRS was taking control of his assets for back taxes. EPA/BOB PEARSON

epa02040499 FBI and local officials inspect debris near the wrecked tail section of a single engine airplane at the Echelon III building in Austin, Texas, USA, 18 February, 2010. The Echelon complex houses the Internal Revenue Service offices for the Austin area. Joseph Andrew Stack, a Georgetown, TX resident is suspected of flying the plane into the side of the building. Stack had recently had received notice that the IRS was taking control of his assets for back taxes. EPA/BOB PEARSON