In this handout provided by the Office of George H.W. Bush, former President Bush looks at the casket with daughter Dorothy as they wait for mourners during the visitation of Barbara Bush. Mark Burns - Pool/Office of George H.W. Bush via Getty Images
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In this handout provided by the Office of George H.W. Bush, former President George H. W. Bush greets mourners with his daughter Dorothy during the visitation of Barbara Bush. Mark Burns - Pool/Office of George H.W. Bush via Getty Images
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Former U.S. first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush, lies in repose at St. Martin's Episcopal Church on April 20, 2018 in Houston. (Photo by Richard Carson - Pool/Getty Images)
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Visitation is held for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Visitation is held for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Visitation is held for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Mourners attend the visitation for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Visitation is held for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Former first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush, lies in repose at St. Martin's Episcopal Church on April 20, 2018. (Photo by Richard Carson - Pool/Getty Images)
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Mourners attend the visitation for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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The hearse carrying the body of former First Lady Barbara Bush makes it's way to St. Martin's Church in Houston, Texas in the predawn hours on April 20, 2018. (DANIEL KRAMER/AFP/Getty Images)
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Former U.S. first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush, lies in repose at St. Martin's Episcopal Church on April 20, 2018 in Houston. (Photo by Richard Carson - Pool/Getty Images)
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Rebecca Halaska wipes a tear after leaving the church during the visitation for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Lucy Orlando holds picture of George and Barbara Bush after leaving the church during the visitation forthe former first lady at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Sherry Browning of Houston waits in line to go through a security check at Second Baptist Church before being bussed to St. Martin's Church to view former First Lady Barbara Bush's casket in repose on April 20, 2018. DANIEL KRAMER/AFP/Getty Images
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Well wishers wait in line at Second Baptist Church in Houston to go through a security check for a bus which will take them to St. Martin's Church where they will view Barbara Bush's casket lying in repose. DANIEL KRAMER/AFP/Getty Images
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Well wishers wait in line at the Second Baptist Church in Houston to go through a security check, for a bus which will take them to St. Martin's Church where they will view Barbara Bush's casket lying in repose. (DANIEL KRAMER/AFP/Getty Images)
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Secretary of Housing and Urban Development Ben Carson attends the visitation for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018. Her funeral service will be Saturday April 21. (Photo by Scott Olson/Getty Images)
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Secretary of Housing and Urban Development Ben Carson speaks to members of the media covering the visitation for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Mourners attend the visitation for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Rebecca Halaska wipes a tear after leaving the church during the visitation for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Lucy Orlando holds picture of George and Barbara Bush after leaving the church during the visitation forthe former first lady at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Mourners attend the visitation for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Former U.S. first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush, lies in repose at St. Martin's Episcopal Church on April 20, 2018 in Houston. (Photo by Richard Carson - Pool/Getty Images)
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The program for services for former first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush, lies in repose at St. Martin's Episcopal Church, April 20, 2018. Richard Carson - Pool/Getty Images
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U.S. Senator John Cornyn (R-TX) attends the visitation for former first lady Barbara Bush at St. Martin's Episcopal Church on April 20, 2018 in Houston, Texas. (Photo by Scott Olson/Getty Images)
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Former U.S. first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush, lies in repose at St. Martin's Episcopal Church on April 20, 2018 in Houston. (Photo by Richard Carson - Pool/Getty Images)
