Grandson pallbearers prepare the casket of former first lady Barbara Bush during the funeral service at St. Martin’s Episcopal Church, Saturday, April 21, 2018, in Houston. (AP Photo/David J. Phil …

Grandson pallbearers prepare the casket of former first lady Barbara Bush during the funeral service at St. Martin’s Episcopal Church, Saturday, April 21, 2018, in Houston. (AP Photo/David J. Phillip )