A gust of wind blows Pope Francis's mantle as he arrives to lead his Wednesday general audience in Saint Peter's square at the Vatican February 19, 2014. REUTERS/Max Rossi (VATICAN - Tags: RELIGION TPX IMAGES OF THE DAY) 

A gust of wind blows Pope Francis's skull cap off as a priest tries to grab it during his Wednesday general audience in Saint Peter's square at the Vatican May 20, 2015. REUTERS/Tony Gentile 

Pope Benedict XVI cape is blown by a gust of wind during Angelus prayer after a holy mass in St. Stephens Cathedral in Vienna September 9, 2007. Pope Benedict urged Catholics to keep Sunday a special day for God and rest and make it a time to reflect on the need to protect God's endangered creation. REUTERS/Fabrizio Bensch (AUSTRIA) 

A gust of wind blows Pope Francis' mantle as he leads his weekly audience in Saint Peter's Square at the Vatican October 15, 2014. REUTERS/Alessandro Bianchi (VATICAN - Tags: RELIGION TPX IMAGES OF THE DAY) 

A gust of wind blows Pope John Paul's cape over his head as a woman hands
him flowers at an arrival ceremony in Ivory Coast in 1990. REUTERS BOOKS
Pope John Paul II Reaching Out Across Borders REUTERS/ Luciano Mellace
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A gust of wind blows Pope Francis' mantle as he leaves at the end of a mass in Saint Peter's Square at the Vatican May 19, 2013. REUTERS/Tony Gentile (VATICAN - Tags: RELIGION TPX IMAGES OF THE DAY) 

A gust of wind blows Pope John Paul II's cassock as he rests his head
in his hands during the weekly general audience in Saint Peter's Square
September 25, 2002. The Vatican announced today that for the first time
in history the Pontiff had accepted an invitation to address both
houses of the Italian parliament on November 14, 2002. REUTERS/Dylan
Martinez

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Pope Benedict XVI reacts to a gush of wind upon arriving in the U.S. at Andrews Air Force Base outside Washington April 15, 2008. REUTERS/Larry Downing (UNITED STATES) 

The cap of Pope John Paul II is blown away by the wind during a holy mass in Maribor September 19. The Pope is in Slovenia for the beatification of Bishop Anton Martin Slomsek.

LE/NS/ 

A gust of wind blows Pope Francis's mantle during his Wednesday general audience in Saint Peter's square at the Vatican February 19, 2014. REUTERS/Max Rossi (VATICAN - Tags: RELIGION) 

A gust of wind blows Pope John Paul II's mantle as an aide comes to the rescue during his weekly audience at his summer retreat in Castelgandolfo July 23, 2003. [The Pope, whose health appears to have deteriorated in the past months, moved to his summer residence two weeks ago and is scheduled to stay in the villa in the cool hills south of Rome until the end of September.] 

Pope Benedict XVI walks beside German President Horst Koehler as heavy wind blows his cape into his face after his arrival at Cologne's airport, August 18, 2005. Pope Benedict will face the toughest crowd of his four-month-old papacy when he visits the World Youth Day festival in Germany, where more than 400,000 lively young Catholics are expected to greet him. Although the youngsters from almost 200 countries are guaranteed to give the 78-year-old German a hearty reception, Benedict will come under scrutiny not only for what he tells his audience but the amount of charm and warmth he can muster. REUTERS/Kai Pfaffenbach KP/AA 

A gust of wind blows the mantle of Pope Francis as he stands next to Sri Lanka's newly elected president Mithripala Sirisena (not seen) at the Colombo airport January 13, 2015. Pope Francis said on Tuesday Sri Lanka needed to find out the truth of what happened during its long civil war in order to consolidate peace and heal scars between religious communities. REUTERS/Stefano Rellandini ( SRI LANKA - Tags: RELIGION POLITICS TPX IMAGES OF THE DAY) 

A gust of wind carries away the cap of Pope Benedict XVI during his general audience in Saint Peter's square at the Vatican October 29, 2008.
REUTERS/Giampiero Sposito (VATICAN) 

A gust of wind blows Pope Francis' mantle as he stands at the balcony of St. John's in Lateran basilica after celebrating a solemn mass in Rome April 7, 2013. The pontiff officially took possession of the basilica which is his cathedral in his capacity as bishop of Rome. REUTERS/Tony Gentile (ITALY - Tags: RELIGION)