Patti Davis, center, and Ronald Prescott Reagan, left, pause at the casket during a graveside service for their mother, Nancy Reagan, at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

Former Canadian Prime Minister Brian Mulroney speaks during the funeral service for Nancy Reagan at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

Ron Reagan, son of the late former President Ronald Reagan and Nancy Reagan, speaks during the funeral service for the former first lady at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

Television journalist Diane Sawyer speaks during the funeral service for Nancy Reagan at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

Rosalynn Carter, left, Caroline Kennedy, center, and Hillary Clinton, right, leave the funeral service for former first lady Nancy Reagan at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

First lady Michelle Obama arrives with former President George Bush and his wife, Laura Bush, right, and Calif. Gov. Jerry Brown and his wife, Anne Gust, left, for funeral services for Nancy Reagan at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

Former President George W. Bush and Laura Bush arrive for the funeral service for Nancy Reagan at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

Newt and Callista Gingrich arrive for the funeral service.

Actors Mr. T and Gary Sinise arrive for funeral services for Nancy Reagan on Friday. Hundreds of friends attended.

Former President George W. Bush, left, and former first lady and secretary of state Hillary Clinton arrive at the funeral service for Nancy Reagan at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

Former California Gov. Arnold Schwarzenegger arrives for the funeral service for Nancy Reagan at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

Opera singer Ana Maria Martinez sings "Ave Maria" during the funeral service for Nancy Reagan at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

Larry King and his wife, Shawn King, were among the celebrities attended funeral services for Nancy Reagan on Friday.

Nancy Reagan's casket is carried into her funeral service at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.

The casket carrying former first lady Nancy Reagan leaves the funeral service at the Ronald Reagan Presidential Library on Friday in Simi Valley, Calif.