In a very emotional dedication ceremony, President Barack Obama praised the new Sept. 11 museum on Thursday May 15, 2014 as "a sacred place of healing and of hope" that captures both the story and the spirit of heroism and helpfulness that followed the attacks. He said: Terrorism Can't Break Us.

Prime Minister Jacinda Ardern announced an immediate ban Thursday on semi-automatic and automatic weapons like the ones used in the attacks on two mosques in Christchurch that killed 50 worshippers.

Belgian young guy who has experienced panic attack since the age of 9 shares with us the way you can stop the attack as soon as possible.He explains what a panic attack is and describes some tricks to stop them.

Instead of its usual cold open sketch, Saturday Night Live offered a message to the French people, in English and French, delivered by Cecily Strong:

“Paris is the City of Lights and here in New York City, we know that light will never go out. Our love and support is with everyone there tonight.

A man performed John Lennon's classic 'Imagine' on a piano outside Bataclan concert hall in Paris - the scene of mass murder on Friday Novemebr 13, 2015

This is the footage from inside the tunnel of the Brussels metro after an explosion at Maalbeek station which has killed at least 20 people on March 22, 2016.

RISING: REBUILDING GROUND ZERO. A Discovery channel documentary focusing on the development and construction of Ground Zero in lower Manhattan, NYC.

During Eagles of Death Metal's November 13 show at the Bataclan concert hall in Paris, gunmen entered the venue and opened fire on the crowd, leaving at least 90 dead. The band spoke to VICE about the tragic events that took place that night.

"Touch Me" by Kazaky © 2013 Kazaky "I LIKE IT." This video reflects the procedures at airports all around the world to stop terrorist attacks. The video has been seen by more that 4.5 million people and it is more appropriate as we face long lines causing many people to loose their flights in the

Former FDNY Chief Joseph Pfeifer was on a routine run in lower Manhattan when he saw a plane aim and crash into the World Trade Center on September 11, 2001. Pfeifer was initially in charge at the scene and made critical decisions that likely saved thousands of lives.