"Imagine getting in a plane crash and having to get back on the same plane again and again and again and being expected to learn and act like nothing's wrong," David Hogg, a senior from Marjory Stoneman Douglas High School in Parkland, Florida, told NBC News.
"Thoughts and prayers are not enough. We have to help solve the problem that's in front of us."
The school shooting suspect accused of killing 17 people stopped his assault when his gun jammed, a report says.
The gun law is designed to close "the boyfriend loophole," which women's advocacy groups have been trying to close for years.
The poll also shows rising support for stricter gun laws.
"Parents have the right to send their kids to school in the mornings and see them home alive at the end of the day," organizers of the walkout wrote on a Facebook page.
The student reportedly violated the school's "Withholding Information" portion of the handbook.
"I do not need this rifle. No one without a law enforcement badge needs this rifle," he wrote.
Cruz is believed to have killed 17 people at Marjory Stoneman Douglas High School.
"Since you and your colleagues in Congress seem to feel that this is the solution to mass murder, please accept this contribution," she wrote.
The military has moved quickly to add a backlog of thousands of names to the list after the mass shooting by an ex-serviceman.
Family members have set up a GoFundMe page to bring Muhiyyidin d'Baha's body back home from New Orleans.
A cousin of the teenage murder suspect's deceased mother told local news that he was a "good kid" who knew "right from wrong."
A GoFundMe drive for Zackari Parrish, the officer killed in a Colorado shooting on Sunday, has raised more than $160,000.
"RIP cousin... can't believe it was just last night that I held you in my arms!" Rihanna posted on Instagram
It has been five years since the Sandy Hook Elementary School shooting — and more than 100 attempts at federal gun reform have failed.
"It's a pleading, not a protest."
Some males find moral and emotional solace in their firearms.
"Please, Mr. President. Refuse to accept these national tragedies as the norm in America," she wrote.
Data shows gun casualties outpace terrorism and drunken driving deaths.
Around half of the victims in the shooting were children.