Former President George H.W. Bush is now on Twitter.
In his first message, Bush honored former South African President Nelson Mandela and expressed regret that he could not attend Tuesday's memorial service:
Barbara and I wish we could have joined the U.S. delegation honoring President Mandela today. He, and his countrymen, are in our prayers.
— George Bush (@GeorgeHWBush) December 10, 2013
The account was quickly verified by Twitter:
— Twitter Government (@gov) December 10, 2013
Bush is the third U.S. president to join the social networking site, along with President Barack Obama and former President Bill Clinton (who joined in April).