So many people have signed DeVon Smith's birthday card for the U.S. Constitution in the past four years that it's more than 2,000 feet long. But he's still hunting for more signatures.

Smith's on the road again, trying to reach as many people as he can before the Constitution's bicentennial ends in December.Three dozen U.S. senators have signed it, as well as Crow Indians from Hardin, Mont. So have entire schools, hospital staffs and the crew of the USS Constitution memorial ship in Boston.

People from all 50 states and 26 foreign countries have signed the card, which says "Celebrate History by Making History" and marks the Constitution's 200th anniversary.

"I'd like to see it stretched out some day, from the Lincoln Memorial down to 17th Street in Washington, D.C.," said Smith, who intends to present the card to U.S. Constitution Bicentennial Commission officials before December.

"There's a little over 46,000 signatures on it now," said Smith, who estimates the card would be more than 2,000 feet long unfolded. Even folded up like an accordion, it's about 3 feet high and weighs about 50 pounds, he said.

People may think the Constitution's two centuries in operation were celebrated in 1987, but the ceremonies have continued through the 200-year anniversaries of the ratification and the Bill of Rights.

Smith, 65, started working on his card in 1987. He gathered more than 32,000 signatures in nine months. He traveled around the country by bus in 1989 and again this year trying to drum up interest in the project.

The rate of signatures fell off in 1988 and 1990, when Smith limited his travels to areas near his home.