From left, Alice Gonzalez Yates, CEO of the George & Barbara Bush Foundation; Dorothy Bush Koch, daughter of Barbara Bush; and first lady Melania Trump unveil the U.S. Postal Service stamp honoring former first lady Barbara Bush at the White House on Thursday. The stamp honors Bush, whose husband was President George H.W. Bush. Barbara Bush died in 2018 at the age of 92. Kayla Bartkowski — Getty Images