Here is details of the tree from Washington State
http://www.capitolchristmastree2006.org/index.html
From the article
A Great Honor for Washington State
Washington State has been given this year's honor of providing the Christmas Tree that will stand in front of the U.S. Capitol Building in Washington D.C.
The tree tree is a majestic, 65-foot tall Pacific Silver Fir and will be decorated with 10,000 lights and 3,000 ornaments handmade by schoolchildren from across Washington State. The highlight of the Capitol's Christmas season will be a simple, but dramatic lighting ceremony, in which the Speaker of the U.S. House of Representatives will light the spectacular tree, continuing a tradition begun in 1964.