The nation honors President George H.W. Bush

Former Secretary of State James Baker, a close friend of George H.W. Bush, is giving the first eulogy at his Texas funeral.

Baker, who described his relationship with Bush as "one of big brother and little brother," called the former president "one of our nation’s finest presidents."

"And beyond any doubt, our nation’s very best one-term president," Baker added.

Baker continued:

Watch: Baker looks back on his relationship with Bush

The Oak Ridge Boys, a country and gospel vocal quartet, just arrived at St. Martin's Episcopal Church, for former president George H.W. Bush's funeral. The group is expected to perform at the service.

The former president was a fan of the group: In 2012, they performed for him while he was hospitalized.

Watch: Behind Bush's relationship with the Oak Ridge Boys

Today's funeral for former President George H.W. Bush is being held at St. Martin's Episcopal Church in Houston.

Houston has been the Bushes home for years since he left the presidency, and they have worshipped at the church for decades.

The church was also the funeral site for his wife, former first lady Barbara Bush, earlier this year.

Former President George H.W. Bush will be remembered at a service at St. Martin's Episcopal Church in Houston this morning.

There will be at least two eulogies at today's funeral, delivered by...

Yesterday, at a state funeral at Washington National Cathedral, four people gave eulogies for the former President:

After former President George H.W. Bush's funeral in Houston, Texas today, he'll take a train that that was specifically built to honor his life to his final resting place.

A Union Pacific train led by a locomotive dubbed the "Bush 4141" will carry Bush's casket to the George H.W. Bush Presidential Library in College Station, Texas.

This isn't an ordinary train: The Bush 4141 is a rare locomotive that was commissioned to honor the former president in 2005.

It's one of only a handful of Union Pacific trains to bear a color scheme other than the company's traditional gray and yellow: It's painted to resemble Air Force One with a white body, a presidential seal and and long vertical bars of blue.

Watch: The significance of the train explained

Former President George H.W. Bush's body has been lying in repose at St. Martin's Episcopal Church in Houston, Texas since yesterday.

Here's how today's services will unfold:

The last will and testament of George H.W. Bush filed in probate court in Harris County names two of his sons — George W. and Jeb Bush — as the co-executors of his estate.

The will, dated April 16, 2009, first listed his late wife Barbara Bush as the independent executrix. George W. and Jeb were named independent co-executors in the event of her passing before him.

The presidential hearse carrying President George H.W. Bush just arrived at St. Martin's Episcopal Church in Houston, Texas.

He will lie in repose at the church from 6:45 p.m. Wednesday to 6 a.m. central time Thursday.

A funeral service is scheduled for Thursday at 10 a.m. central time.

Watch the arrival to St. Martin's Episcopal Church here:

President historian Jon Meacham had read the eulogy he delivered today at the state funeral to George H.W. Bush before he passed away, a source with knowledge told CNN.

Meacham, Bush's biographer, told the assembled family, friends and dignitaries of Bush's life code: "Tell the truth. Don't blame people. Be strong. Do your best. Try hard. Forgive. Stay the course."

Meacham called it "the most American of creeds."

Bush, Meacham said, had a lasting impact.