Christophe Ena/AP Photo
  • People pay respect to the victims of the attacks outside the Bataclan concert hall in Paris, Nov. 17, 2015.
    Christophe Ena/AP Photo
  • A Spanish Civil Guard stands guard next to candles and flowers in memory of victims of the deadly attacks in Paris outside the French embassy in Madrid, Nov. 17, 2015.
    Susana Vera/Reuters
  • People leave flowers and candles in front of the city hall at Marche Square in Brussels during a ceremony held for Elif Dogan, a Belgian-Turkish citizen who was killed with her boyfriend, Milko Jozic, Nov. 17, 2015.
    Dursun Aydemir/Anadolu Agency/Getty Images
  • A photograph is posted on a makeshift memorial outside the Bataclan concert hall, Nov. 17, 2015.
    Peter Dejong/AP Photo
  • Jean-Marie de Peretti mourns the loss of his 33-year-old daughter Aurelie, one of the victims of the attack on the Bataclan concert hall in Paris, Nov. 17, 2015.
    Peter Dejong/AP Photo
  • Children hold up a banner saying "Pray for Paris" during the U19 Four-Nations-Cup, Germany vs. France match on Nov. 17, 2015 in Homburg, Germany.
    Andreas Schlichter/Bongarts/Getty Images
  • A man holds the French flag in front of the Bataclan concert hall in Paris, Nov. 17, 2015.
    Peter Dejong/AP Photo
  • Two mourners kiss outside the Bataclan concert hall, adorned with a banner reading "Freedom is a monument which can not be destroyed," in Paris, Nov. 17, 2015.
    Peter Dejong/AP Photo
  • Armed police officers stand guard by floral tributes outside the French embassy in central London following last week's attacks in Paris on Nov. 17, 2015.
    Niklas Halle'n/AFP/Getty Images
  • A cyclist pauses to look at candles and floral tributes to victims of the attacks at the Bataclan Theater in Paris on Nov. 17, 2015, where at least 82 people were killed.
    Patrick Kovarik/AFP/Getty Images
  • A woman lights a candle during a silent memorial for the victims of the terrorist attacks in Paris in Geneva, Nov. 16, 2015.
    Salvatore Di Nolfi/EPA
  • Members of the public view candles and tributes left opposite the main entrance of Bataclan concert hall as French police lift the cordon following Fridays terrorist attacks on Nov. 16, 2015 in Paris.
    Jeff J Mitchell/Getty Images
  • People pray for the victims of Paris attacks inside Santa Maria in Trastevere Basilica in Rome on Nov. 16, 2015.
    Filippo Monteforte/AFP/Getty Images
  • People light lanterns in memory of the victims of Friday's terror attacks at Place de la Republique on Nov. 16, 2015 in Paris.
    Jeff J Mitchell/Getty Images
  • People gather and view messages written on the ground at the Nimes Roman arena in memory of the victims of the Paris terror attacks last Friday, on Nov. 16, 2015 in Nimes, France.
    Patrick Aventurier/Getty Images
  • A woman lights a candle at a makeshift memorial on Nov. 16, 2015 in Nice, France.
    Valery Hache/AFP/Getty Images
  • Members of Alliance Francaise of Bengal hold a candle during a vigil for victims of the Paris terror attack on Nov. 16, 2015 in Kolkata, India.
    Ashok Nath Dey/Hindustan Times via Getty Images
  • A young boy views tributes left opposite the main entrance of Bataclan concert hall, Nov. 16, 2015, in Paris.
    Jeff J Mitchell/Getty Images
  • A woman weeps as she kneels near bouquets of flowers and burning candles at the Place de la Republique in Paris, Nov. 16, 2015.
    Christian Hartmann/Reuters
  • People gather in front of Le Carillon cafe, a site of recent attacks, in Paris, Nov. 16, 2015. French President Francois Hollande says the Paris attacks targeted "youth in all its diversity" and that the victims were of 19 different nationalities.
    Jerome Delay/AP Photo
  • People gather to commemorate the victims of the Paris terror attacks at the Brandenburg Gate in Berlin on Nov. 16, 2015.
    Mehmet Kaman/Anadolu Agency/Getty Images
  • A couple holds hands during a memorial ceremony Nov. 16, 2015 in Port-au-Prince, Haiti in tribute to the victims of the terror attacks in Paris.
    Hector Retamal/AFP/Getty Images
  • The dome of the U.S. Capitol is seen as a man walks past flags flying at half staff at the Washington Monument on the National Mall in Washington, Nov. 16, 2015. President Barack Obama issued a proclamation ordering flags to fly at half staff as a mark of respect for victims of the Paris attacks.
    Kevin Lamarque/Reuters
  • A television reporter walks past the entrance to the French embassy, adorned with flowers and expressions of sympathy, in Washington, D.C. on Nov. 16, 2015.
    Carlos Barria/Reuters
  • A general view of the tributes outside the Le Carillon restaurant, one of the scenes of last friday's terror attacks, Nov. 16, 2015 in Paris.
    Christopher Furlong/Getty Images
  • Flowers and signs are seen at a makeshift memorial outside the French Embassy in Washington, Nov. 16, 2015.
    Jim Watson/AFP/Getty Images
  • The Eiffel Tower is lit with the blue, white and red colors of the French flag in Paris, Nov. 16, 2015.
    Benoit Tessier/Reuters
  • People observe a moment of silence at the Place du Trocadero in Paris, Nov. 16, 2015.
    Kenzo Triboillard/AFP/Getty Images
  • People observe a moment of silence in front of the Notre Dame Cathedral, Nov. 16, 2015 in Paris.
    Patrick Kovarik/AFP/Getty Images
  • French President Francois Hollande and French Prime Minister Manuel Valls observe a moment of silence, Nov. 16, 2015, at the Sorbonne University in Paris.
    AFP/Getty Images
  • People observe a moment of silence, Nov. 16, 2015, at the Le Carillon cafe in Paris.
    Eric Feferberg/AFP/Getty Images
  • People hold candles while participating in a vigil in remembrance of Nohemi Gonzalez at California State University in Long Beach, Calif., Nov. 15, 2015.
    Jonathan Alcorn/Reuters
  • Two women hug each other as people place flowers and light candles in tribute to the victims of the Nov. 13 attacks, in front of the Carillon restaurant, in Paris, Nov. 15, 2015.
    Etienne Laurent/EPA
  • Flowers and candles are placed outside the La Belle Equipe restaurant along the Rue de Charonne in central east Paris, Nov. 15, 2015.
    Kenzo Triboillard/AFP/Getty Images
  • A woman is comforted by others outside the Carillon cafe and the Petit Cambodge restaurant in Paris, Nov. 14, 2015, a day after over 120 people were killed in a series of attacks in Paris.
    Jerome Delay/AP Photo
  • People mourn for the victims of the deadly attacks in Paris, outside the French embassy in Warsaw, Poland, Nov. 14, 2015.
    Alik Keplicz/AP Photo
  • An unnamed man brings his portable grand piano and plays John Lennon's Imagine outside the Bataclan concert hall, Nov. 14, 2015 in Paris.
    John Walton PA via AP
  • With the Brandenburg Gate, illuminated in the French national colors, in the background, people lay down flowers and light candles for the victims killed in the Friday's attacks in Paris, in front of the French Embassy in Berlin, Nov. 14, 2015.
    Markus Schreiber/AP Photo
  • People holding placards listen to speakers as they take part in a vigil for victims of the deadly attacks in Paris, in Trafalgar Square, London, Nov. 14, 2015.
    Matt Dunham/AP Photo
  • People gather in Hong Kong, Nov. 14, 2015, to mourn for the victims killed in Friday's attacks in Paris.
    Kin Cheung/AP Photo
  • People finish arranging candles into the word "Paris" next to flowers and messages left at the gate of the French Embassy following the recent terror attacks in Paris, Nov. 14, 2015 in Berlin.
    Sean Gallup/Getty Images
  • An Indian child pays floral tribute at a sand sculpture created in remembrance of victims of Friday's attacks in Paris, in Bhubaneswar, India, Nov. 14, 2015.
    Biswaranjan Rout/AP Photo
  • Women comfort each other as they stand in front of the Carillon cafe, in Paris, Nov.14, 2015.
    Thibault Camus/AP Photo
  • People place candles as they pay tribute to the victims of Paris attacks in front of the French embassy in Seoul, South Korea, Nov. 14, 2015.
    Kim Hong-Ji/Reeuters
  • A protester holds a black ribbon and balloons with the colors of the French flag during a demonstration of Spanish Civil Guards in Madrid, Spain, November 14, 2015.
    Susana Vera/Reuters
  • A man gestures as he places a candle at a makeshift memorial outside the Consulate General of France to pay tribute to the victims of the terror attack in Paris, Nov. 13, 2015, in San Francisco, Calif.
    Stephen Lam/Reuters
  • People light candles in tribute to the victims of the Paris attacks, outside the French embassy in Berlin, Nov. 13, 2015.
    Lukas Schulze/EPA
  • People light candles at a vigil outside the French consulate in Montreal, Nov. 13, 2015.
    Graham Hughes/The Canadian Press/AP Photo
  • UNLV fans observe a moment of silence for the victims of the terrorist attacks in Paris, Nov. 13, 2015, before UNLV's basketball game against Cal Poly at the Thomas & Mack Center in Las Vegas.
    Sam Morris/Las Vegas News Bureau/AP Photo
  • A student holds a sign in recognition of the attacks in Paris before the game between the Notre Dame Fighting Irish and the St. Francis Red Flash at the Purcell Pavilion on Nov. 13, 2015, in South Bend, Ind.
    Matt Cashore/USA TODAY Sports/Reuters
  • Peru's national soccer players observe a minute of silence for victims of attacks in Paris, before their 2018 World Cup qualifying soccer match against Paraguay at Nacional stadium in Lima, Nov. 13, 2015.
    Mariana Bazo/Reuters
  • San Francisco City Hall is lit up with blue, white and red, the colors of the French flag, following the Paris terror attacks, in San Francisco, Calif., Nov. 13, 2015.
    Stephen Lam/Reuters
  • Shanghai's landmark building Oriental Pearl TV Tower is lit up in blue, white and red, the colors of the French flag, following the Paris attacks, in Shanghai, China, Nov. 14, 2015.
    Aly Song/Reuters
  • Taiwan's landmark building Taipei 101 is lit up in blue, white and red, the colors of the French flag, following the Paris attacks, in Taipei, Nov. 14, 2015.
    Pichi Chuang/Reuters
  • One World Trade Center's spire is shown lit in French flags colors of white, blue and red in solidarity with France after tonight's terror attacks in Paris, Nov. 13, 2015, in New York City.
    Daniel Pierce Wright/Getty Images
  • The Calgary Tower was lit up with the colors of the French flag to show support and sympathy regarding the Paris attacks in Calgary, Alberta, Nov. 13, 2015.
    Larry MacDougal/The Canadian Press/AP Photo
  • The Angel de la Independencia monument is lit up in blue, white and red, the colors of the French flag, following the Paris terror attacks, in Mexico City, Nov. 14, 2015.
    Tomas Bravo/Reuters
  • The Senate building is lit up in blue, white and red, the colors of the French flag, following the Paris terror attacks, in Mexico City, Nov. 14, 2015.
    Tomas Bravo/Reuters
  • One World Trade Center is lit in the Blue, White and Red colors of the French flag in honor of the victims of the attacks in Paris, in the Manhattan borough of New York, Nov. 13, 2015.
    Carlo Allegri/Reuters