Pope Francis is brushing off security concerns to forge ahead with a two-day trip to Egypt aimed at presenting a united Christian-Muslim front that repudiates violence committed in God's name.

Three weeks after Islamic militants staged twin Palm Sunday church attacks, Francis has just landed in Cairo for a series of deeply symbolic encounters with Egypt's religious and political leadership. He will meet with Egypt's president, patriarch and the "other" pope, Tawadros II of the Coptic Orthodox Church, and pray for victims of the attacks.