"The 41st president died late Friday at his Houston home at age 94".
In a heartbreaking photo posted to Sully's Instagram account on Sunday, the yellow labrador - who was named after pilot Sully Sullenberger - is seen lying in front of Bush's American flag-draped casket with a forlorn look on his face.
The socks feature a formation of jets, which are meant to honor his lifetime of service that started when he became a naval aviator at 18 years old.
Instead, the Bush family has lined up four people to give eulogies - including Bush's son President George W. Bush. The public can pay their respects to the 41st president from 5:30 p.m. MT Monday to 6:45 a.m. MT Wednesday.
David J. Phillip Pool AP
Social media users thanked Sully for his services and commented on his and dogs' loyalty generally towards their owners.
Former President George H.W. Bush is returning to Washington as a revered political statesman, hailed by leaders across the political spectrum and around the world as a man not only of greatness but also of uncommon decency and kindness.
Both Bush's wife Barbara, the former first lady who died in April, and their daughter Robin, who died of leukemia as a child, are laid to rest on the library's grounds.
Israeli PM Netanyahu's legal troubles mount as police seek new bribery charges
Other opposition figures, including opposition leader Tzipi Livni, quickly joined in the call for Netanyahu to resign. They recommended Sara Netanyahu face charges of bribery, fraud, breach of trust and obstruction of evidence.