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People wait for the motorcade carrying former first lady Barbara Bush Saturday, April 21, 2018, in College Station, Texas. (AP Photo/Mark Humphrey)
Former Presidents George H.W. Bush and George W. Bush accompanied by their family members watch as pallbearers carry the casket of former first lady Barbara Bush after a funeral service Bush at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (AP Photo/Evan Vucci)
Dorothy "Doro" Bush Koch wraps her arm around her father, former president George H.W. Bush, during the funeral for former first lady Barbara Bush at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (Brett Coomer/Houston Chronicle via AP, Pool)
Former President George H.W. Bush and George W. Bush, followed by former first lady Laura Bush follow as pallbearers carry the casket of former first lady Barbara Bush after a funeral service at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (AP Photo/Evan Vucci)
Former Presidents George H.W. Bush and George W. Bush accompanied by their family members watch as pallbearers carry the casket of former first lady Barbara Bush after a funeral service Bush at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (AP Photo/Evan Vucci)
Pallbearers carry the casket of former first lady Barbara Bush after a funeral service for former first lady Barbara Bush at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (Jack Gruber /USA Today via AP, Pool)
Jenna Bush, left, wipes away tears as granddauters gather to speak during a funeral service for former first lady Barbara Bush at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (AP Photo/David J. Phillip , Pool)
The hearse carrying the casket of former first lady Barbara Bush leaves after a funeral service for former first lady Barbara Bush at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (AP Photo/Evan Vucci)
Pallbearers carry the casket of former first lady Barbara Bush after a funeral service for former first lady Barbara Bush at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (Brett Coomer/Houston Chronicle via AP, Pool)
Kelly Yates holds up a sign as she waits on the route for the motorcade carrying former first lady Barbara Bush, Saturday, April 21, 2018, in College Station, Texas. (AP Photo/Mark Humphrey)
Rev. Dr. Russell J. Levenson, Jr., second from right, gives a sermon during a funeral service for former first lady Barbara Bush at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (AP Photo/David J. Phillip , Pool)
Leah Martin and and her daughter Jenny Mulvey wait for the motorcade carrying former first lady Barbara Bush Saturday, April 21, 2018, in College Station, Texas. (AP Photo/Mark Humphrey)
Pallbearers carry the casket of former first lady Barbara Bush after a funeral service for former first lady Barbara Bush at St. Martin's Episcopal Church, Saturday, April 21, 2018, in Houston. (AP Photo/David J. Phillip , Pool)