Carter wore an Atlanta Braves baseball cap, but his left eye was swollen and bruised and he had a white bandage above his eye. The Carters were introduced by country stars Garth Brooks and Trisha Yearwood, who called the Carters the hardest working volunteers, and sang a couple of duets during the concert.
Rosalynn Carter praised the country couple for volunteering at previous Habitat for Humanity building projects, saying she once saw Yearwood way up in the rafters of a home working hard during construction.
Former President Carter then joked, "While Garth just watched her," which drew laughs from the crowd and Yearwood. Carter seemed to be in good spirits and came out a short time later to point to his baseball cap and mention that the Braves beat the St. Louis Cardinals that day as well.
Twenty-one homes are scheduled to be built in a neighborhood in Nashville. The concert also featured performances by Melinda Doolittle, the Fisk Jubilee Singers and members of the Nashville Symphony Quartet.
Carter survived a dire cancer diagnosis in 2015 and surpassed George H.W. Bush as the longest-lived US president in history this spring. He has had some trouble walking after a hip replacement in May, but regularly teaches Sunday School.
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Meanwhile, he has continued with his humanitarian work. And he also has occasionally weighed in on politics and policy, recently expressing hopes that his Carter Centre will become a more forceful advocate against armed conflicts in the future, including "wars by the United States".
"I just want to keep the whole world at peace," Carter had said as he presented his annual Carter Centre report last month.
"We have been at war more than 226 years. We have been at peace for about 16 years" since the Declaration of Independence in 1776, he said, adding that every US military conflict from the Korean War onward has been a war of "choice".
Carter also has been accepting visits from several 2020 presidential candidates, but he's held back on endorsing any of his fellow Democrats, offering few clues to his thinking.
- AP