Las Vegas ? The two most successful artists at the Academy of Country Music Awards continued their winning ways Wednesday, with Alan Jackson capturing album of the year for “Drive” as well as a video honor and Brooks & Dunn being named top vocal duo.

But in a program strong on patriotism, some in country music showed they were not prepared to forgive the Dixie Chicks’ Natalie Maines for remarks critical of President Bush and the war in Iraq.

The trio was nominated in three categories but went home empty-handed. When Vince Gill announced their nomination for entertainer of the year, it was roundly booed by the Las Vegas audience.

The award to Brooks & Dunn extended their collection of ACMs to a record 17. Jackson’s tally rose to 11.

“Stick with us. We love you,” Ronnie Dunn said.

The show repeatedly saluted the armed forces, including cheers for three freed POWs of the Iraq war who were invited on stage — Chief Warrant Officer Ronald Young Jr. from Fort Hood, Texas; and Pfc. Patrick Miller, of Kansas, and Spc. Shoshana Johnson, stationed at Fort Bliss, Texas.

Kenny Chesney captured two major awards — male vocalist of the year and record of the year for “The Good Stuff,” ending a six-year drought since he was named new male vocalist in 1997.

Jackson, who won three honors including male vocalist a year ago, had six nominations this year — two behind Toby Keith and one ahead of Chesney.