A card that reads "Hugs for Paris" is placed outside the French Embassy in Washington D.C., Nov. 13, 2015. Over 100 people were killed in a mass hostage-taking at a Paris concert hall Friday and many more were feared dead in a series of bombings and shootings. (Xinhua/Bao Dandan)

A card that reads "Pray for France" is placed outside the French Embassy in Washington D.C., Nov. 13, 2015. Over 100 people were killed in a mass hostage-taking at a Paris concert hall Friday and many more were feared dead in a series of bombings and shootings. (Xinhua/Bao Dandan)

A man lays a flower at the French Embassy in Washington D.C., Nov. 13, 2015. Over 100 people were killed in a mass hostage-taking at a Paris concert hall Friday and many more were feared dead in a series of bombings and shootings. (Xinhua/Bao Dandan)

Flags fly at half-mast at the French Embassy in Washington D.C., Nov. 13, 2015. Over 100 people were killed in a mass hostage-taking at a Paris concert hall Friday and many more were feared dead in a series of bombings and shootings. (Xinhua/Bao Dandan)

Flowers are placed outside the French Embassy in Washington D.C., Nov. 13, 2015. Over 100 people were killed in a mass hostage-taking at a Paris concert hall Friday and many more were feared dead in a series of bombings and shootings. (Xinhua/Bao Dandan)

Men hold a French flag outside the French Embassy in Washington D.C., Nov. 13, 2015. Over 100 people were killed in a mass hostage-taking at a Paris concert hall Friday and many more were feared dead in a series of bombings and shootings. (Xinhua/Bao Dandan)

Men hold a French flag outside the French Embassy in Washington D.C., Nov. 13, 2015. Over 100 people were killed in a mass hostage-taking at a Paris concert hall Friday and many more were feared dead in a series of bombings and shootings. (Xinhua/Bao Dandan)

Colors that resemble the French national flag are seen on top of the tower of One World Trade Center in New York Nov. 13, 2015. Over 100 people were killed in a mass hostage-taking at a Paris concert hall Friday and many more were feared dead in a series of bombings and shootings. (Xinhua/Li Muzi)

A woman offers a flower at the French Embassy in Moscow, Russia, Nov. 14, 2015. Over 100 people were killed in a mass hostage-taking at a Paris concert hall Friday and many more were feared dead in a series of bombings and shootings. (Xinhua/Pavel Bednyakov)