To a mix of cheers and jeers, President George W. Bush opened baseball's newest stadium Sunday night with a ceremonial first pitch. Bush waved twice quickly as he strode to the mound at Nationals Park. He wasted little time before throwing a high pitch straight down the middle to Washington Nationals manager Manny Acta. Bush acknowledged the crowd one more time by raising his hand as he left the field, again hearing applause and boos. A few minutes later, Acta's team took the field to play the Atlanta Braves to open the National League season. It was the second time Bush has performed the honor in Washington and the sixth time overall in his presidency. He threw out the first pitch in 2005 - mostly to cheers - when baseball returned to the city after more than three decades.