The Democratic presidential candidates are preparing to duke it out at the third primary debate Thursday evening in Houston, but many of them showed solidarity in an anti-gun violence video posted Monday.

Eight of the 10 candidates who qualified for the debate partnered for the video with the gun control group Giffords, which takes its name from its co-founder, former Rep. Gabrielle Giffords (D-Ariz.), who survived an assassination attempt in 2011. The video features Sens. Elizabeth Warren (D-Mass.), Bernie Sanders (I-Vt.), Kamala Harris (D-Calif.), Cory Booker (D-N.J.), and Amy Klobuchar (D-Minn.), former Vice President Joe Biden, former Rep. Beto O'Rourke (D-Texas), and South Bend, Indiana, Mayor Pete Buttigieg, all of whom call for stronger gun safety measures with a particular emphasis on making sure children feel safe in their educational settings in the wake of school shootings that have plagued the United States for decades.