"I can't get on a plane with a bottle of water," Pollack said. "But some animal can walk into a school and kill our children."

"We as a country failed our children," the anguished father stressed as he proposed a fix to the school first.

Samuel Zeif, who lost a best friend when Cruz opened fire at the Florida high school, said that he was here to use his voice because his friend can't.

Zeif, 18, said that he fully respects the Second Amendment that protects gun ownership in the country, while questioning why Cruz could be permitted to buy an assault rifle, which he called a "weapon of war."

Besides pleas inside the White House, hundreds of protesters gathered outside it Wednesday afternoon to call for restrictions on guns. Beyond Washington D.C., students across the country took to the streets to demand safer schools and an end to gun violence.

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