"I personally hope that Livestrong is stronger than Lance Armstrong because they have done -- and continue to do -- amazing work for people with cancer, " he told CNN in a telephone interview.

CNN: STORY HIGHLIGHTS

In a telephone interview on the private ONTV channel, Pope Tawadros said Mohammed Morsi had "promised to do everything to protect the cathedral but in reality we don't see this".

BBC: Egypt: Pope Tawadros rebukes Morsi over Cathedral clash