Alvarez was joined Saturday morning by students and more than 150 people who expressed frustration, anger and resolve at a rally in solidarity with "March for Our Lives" - a national movement against gun violence that captivated cities nationwide.
Demonstrations are also taking place in Parkland, Florida, where a shooting that killed 17 students at Marjory Stoneman Douglas High School became the catalyst for the marches, and in Las Vegas, where a gunman killed 58 people at a country music festival a year ago.
NewsFix reached out to the NRA for comment, but they have tweeted out, "Many high schoolers do not blame school shooting on guns and don't argue the answer is tighter restrictions on second amendment rights". They hope these marches will provide momentum for change ahead of the upcoming midterm elections.
"I'm lucky enough that both of my children are alive I think it's unfair that there are lots of parents including Parkland parents whose children can't be here today", said Bayerkohler.
More than 800 similar protests were planned nationwide and overseas, with solidarity events taking place in Edinburgh, London, Geneva, Sydney and Tokyo. Students wore maroon T-shirts - the school's color - and chanted slogans such as "Enough is enough".
The teenage United States organisers have won kudos and cash from dozens of celebrities, with singer Ariana Grande and Hamilton creator Lin-Manuel Miranda among those performing in Washington. They also mobilized young people to register to vote.
A key focus of Saturday's march on Washington, which was duplicated in 800 cities across the country and around the world, was an effort to turn emotion into political activism by registering participants to vote. "Stand with us or beware, the voters are coming", Cameron Kasky, a 17-year-old junior at Marjory Stoneman Douglas, told the crowd.
Parkland survivor Emma Gonzalez has become known for firing up crowds with her words. "I'm here to say "never again" for those girls, too". Then, a timer beeped.
An average of 30 people a day are killed by someone using a gun, said Stephen Gale, reading a message from his boss, Rep. Mike Thompson, D-St. "The shooter has ceased shooting and will soon abandon his rifle, blend in with the students as they escape and walk free for an hour before arrest". González, 18, told the crowd, "Fight for your lives before it's someone else's job".
San Diegans will join protests across the U.S. Saturday in a call for gun control reform, stemming from February's deadly Parkland school shooting.
President Donald Trump was in Florida for the weekend.
Following this, massive protests were held by students across the United States to pressurise the Trump administration for tougher gun measures.
But in the end, the administration didn't push for any bold measures.
Attorney General Jeff Sessions Friday announced a proposed rule to ban so-called bump stocks that allow semi-automatic guns to fire more rapidly, similar to a fully automatic weapon.
"Today many are peacefully exercising their #1A right to march for gun ban".
The ongoing debate on gun laws in America is filled with passionate opinions.
About 100 counterprotesters gathered for the March for Our Lives gun control rally in Boston, according to CNN affiliate WBZ-TV.
FOX 5 spoke to Kashuv as he traveled the country speaking about legislation to keep students safe as an alternative to gun control legislation. Thousands of people have said they are going on the march's Facebook event.