A year after the school shooting in Parkland, Fla.

Students are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that killed 17 people on Feb. 14, 2018 in Parkland, Fla.

(Joe Raedle / Getty Images)

Feb. 13, 2019 11:02 AM PT

A look back at the mass shooting that killed 17 at Marjory Stoneman Douglas High School, and the student activism that followed.

Mechelle Boyle hugs a student as they wait for news after the mass shooting at Marjory Stoneman Douglas High School.

(Joel Auerbach / Associated Press)

Students gather Feb. 16, 2018, at a memorial in Parkland, Fla., to remember those who were killed and injured in the shooting.

(Carolyn Cole / Los Angeles Times)

Thousands gather for a vigil at Pine Trails Park in Parkland, Fla., to remember those who were killed and injured in the shooting.

(Carolyn Cole / Los Angeles Times)

Majory Stoneman High School student Cameron Kasky addresses students as they rally Feb. 21, 2018, at the school following a county-wide school walkout.

(Rhona Wise / AFP/Getty Images)

A student gets a hug as she leaves Marjory Stoneman Douglas High School after attending classes for the first time since the shooting.

(Joe Raedle / Getty Images)

Students rally in front of the White House on March 14 to protest gun violence.

(Carolyn Kaster / Associated Press)

Andrew Pollack, flanked by his sons, speaks during a listening session on gun violence with President Trump, teachers and students at the White House on Feb. 21, 2018. Pollack’s daughter Meadow was killed in the Marjory Stoneman Douglas High School shooting in Parkland, Fla.

(Mandel Ngan / AFP / Getty Images)