People are joining together in mourning and solidarity for the victims of Friday's attacks in Paris.
On Friday, Nov. 13, more than 120 people died as the result of a series of gun and bomb attacks across Paris.
The world watched as news of the attacks made its way from the French capital.
For a sense of scale, yesterday's events marked the deadliest attack on European soil since the 2004 Madrid train bombings that killed 191 and left 1,841 injured.
Facebook moved quickly, enabling its new "Safety Check" feature, aimed at helping people near the attacks let their friends and family know they're safe.
Across the city, people are mourning the tragic loss of life.
On Saturday morning, a man played John Lennon's "Imagine" on a piano outside the Bataclan theater.
"Imagine all the people, living life in peace."
The morning after the attacks, crowds in Paris lined up to donate blood.
With more than 200 people hospitalized in the wake of the attacks, it's heartening to see people so ready to help in whatever way they can.
Around the world, cities joined in solidarity with Paris, lighting up monuments in blue, white, and red.
New York City, United States
Seoul, South Korea
Auckland, New Zealand
No matter where people were in the world, they turned up with flowers and candles to stand in solidarity with France.
Hong Kong, China
In times of chaos and destruction, it's important to believe in the power of human kindness.
These types of attacks are meant to disrupt. These types of attacks are meant to provoke the world. In these times, it's crucial we look at those who refuse to respond out of hatred or vengeance, but instead with a message of love and peace.