A flower and a small Vatican flag are left on the memorial for those lost during the September 11, 2001 attacks.

Reuters/New York
Pope Francis, leading a multi-faith prayer service at the site of the September 11, 2001 World Trade Centre attacks, called yesterday on people to embrace diversity and resist attempts to impose uniformity.
Earlier in a speech to the United Nations, he condemned the persecution of religious minorities and the destruction of cultural heritage, a clear reference to the actions of Islamic State (IS) militants in Syria.
“Here grief is palpable.” Francis said at the reflecting pools marking the footprints of the Twin Towers destroyed in the attacks and where 2,606 people died after Al Qaeda militants crashed hijacked jetliners into the buildings.
Overall, 2,977 victims died and the 19 hijackers of four planes they commandeered.
Standing in front of the concrete “slurry wall” that held back the Hudson River from the towers’ foundations and flanked by a dozen religious leaders from the Jewish, Muslim, Hindu, Sikh, Buddhist and Greek Orthodox traditions, Francis spoke to a crowd of about 700 people in an underground gallery.
“In opposing every attempt to create a rigid uniformity, we can and must build unity on the basis of our diversity of languages, cultures and religions, and lift our voices against everything which would stand in the way of such unity,” said the Argentina-born Francis.
Family members of six people killed in the attacks met Pope Francis near the pool that marks the former base of the south tower.
The Pope briefly stopped to pray at the fountain, leaving a flower before he moved on.