Warren beat Thailand's Somjit Jongjohor 13-9 despite having two front teeth knocked out.

Andrade gave the Americans their second gold when his bout with Thailand's Non Boonjumnong was stopped in the second round due to an injury.

Andrade went right at his opponent, landing combinations that resulted in a 6-0 lead and a standing eight count after the first minute, and he led 10-1 at the end of the round. He was ahead 11-3 late in the second when Boonjumnong came up clutching his right arm.

The fight was stopped. The gold was Andrade's, capping the best showing by the U.S. in years. Andrade, Warren, and three other U.S. boxers earned trips to the 2008 Olympics in Beijing.

The U.S. had not won gold at the world championships since taking four in 1999.

On Saturday, Warren sounded a warning for Beijing.

"You better watch out. The young American is coming," Warren said.

Warren was serenaded by "USA! USA!" chants before the opening bell and throughout the fight. And he didn't disappoint.

Warren took control in the second round, knocking down Jongjohor and turning a 2-1 lead into a 10-4 advantage.

The score was 5-1 after Warren landed two quick lefts and he stayed on the attack even after two incisors got knocked out midway through the round. He sent his opponent to the canvas with a right hook in the closing seconds.

Days before the event began, Warren guaranteed he would make the finals and he did just that with a 26-13 victory over Azerbaijan's Samir Mammadov in Friday's semis. Along the way, he qualified for his second consecutive Olympics, meaning he'll be the first American since Davey Lee Armstrong in 1976 to compete in two straight.

Warren was 17 and the youngest member of the 2004 boxing team when he traveled to Athens. He was also a little lighter and not as polished.

Now fighting at 112 pounds, Warren competed at 106 in Athens. A two-time national champion, he took the bronze at the 2005 world championships.

But nothing could stop him this time. Not a sore right shoulder. And not his opponents.

"I'm the world champion now," he said. "I can say that I'm No. 1 in the world, not No. 3. I'm No. 1."

Warren seemed to ease off in the final two rounds of his bout with Jongjohor, doing just enough to stay in control. And when it was over, he raised both arms, jogged around the ring and hugged his corner. Then, the U.S. flag was draped around his shoulders.

Warren gave himself "a B-plus" for Friday's fight, but on Saturday?

"A-plus," he said.

Warren planned to put the medal around the neck of his mom Paulette Warren Gordon. She couldn't wait, but her eyes are on a bigger prize, just like her son's. Warren's mother wore a T-shirt with a picture of her son posing in the backyard with 15 championship belts and the slogan: "If you want me, come get me."

"That gold is a piece of cake," she said, referring to the Olympic version. "I'm just waiting to put it on a plate. This gold was pretty exciting, too."

The city hoped to use the World Boxing Championships as a boost in its bid for the 2016 Summer Games. Chicago didn't get the championships until May, after it was pulled from Moscow.