Civil Rights Summit Opens with Immigration Talk

DAYTON, OH - NOVEMBER 20: Special Air Mission (SAM) 26000, President John F. Kennedy's Air Force One, sits on display at the National Museum of the United States Air Force in the Presidential Gallery on November 20, 2013 in Dayton, Ohio. SAM 26000 flew JFK's body from Dallas to Washington D.C. Vice President Lyndon B. Johnson was sworn in as the new president on the plane earlier in the day. (Photo by Matt Sullivan/Getty Images)
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AUSTIN, Texas (AP) - A civil rights summit headlined by four of the five living U.S. presidents has started with a top Republican and Democrat finding common ground on ideas for immigration reform.

The Lyndon B. Johnson Presidential Library in Austin is holding a three-day summit to mark the 50th anniversary of the Civil Rights Act.

San Antonio Mayor Julian Castro and former Republican Mississippi Gov. Haley Barbour were among the first speakers Tuesday. Both say it's important that Congress sets realistic standards for border security.

Castro is a top supporter of President Barack Obama but says he's uncomfortable with the number of deportations during Obama's administration.

Obama is giving the keynote address Thursday, and former President George W. Bush is scheduled to be the summit's final speaker Thursday.