Simplify the following text for a Grade 8 native English-speaking person.
Original: He was unable to officiate at the state funeral of Ronald Reagan on June 11 , 2004 , because of recent double hip replacement surgery , which former President George H. W. Bush acknowledged during his eulogy .
Simplified: Graham has spoken at many funerals over the years , but he was unable to do Reagan 's on June 11 , 2004 , because of recent hip surgery .