An army soldier works at the new Coptic Cathedral of the Nativity in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

A worker carries an element with a cross outside the Cathedral of the Nativity in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

An army soldier walks near workers cleaning the interior of the new Coptic Cathedral of the Nativity in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019. REUTERS/Amr Abdallah Dalsh

An Egyptian worker is seen inside al-Fattah al-Aleem Mosque in the New Administrative Capital (NAC) east of Cairo, Egypt, January 3, 2019. Picture taken January 3, 2019. Reuters/Amr Abdallah Dalsh

A worker cleans the interior of the new Coptic Cathedral of the Nativity at the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

A worker cleans the interior of the new Coptic Cathedral of the Nativity in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

A worker is seen inside al-Fattah al-Aleem Mosque in the New Administrative Capital (NAC) east of Cairo, Egypt, January 3, 2019. Picture taken January 3, 2019.

A general view shows people refueling their vehicles near a poster of Egypt's President Abdel Fattah al-Sisi at a Mobil petrol station during a sandstorm in Cairo, Egypt January 6, 2019.

A general view of al-Fattah al-Aleem Mosque in the New Administrative Capital (NAC) east of Cairo, Egypt, January 3, 2019.

Members of the Egyptian Army guard outside the new Coptic Cathedral of the Nativity in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.