"My mom was terrified that my dad, a police inspector in charge of Senate security, was not coming back on March 1, 1954, the day four Puerto Rican nationalists pulled out guns and sprayed bullets..."

"... from the spectators’ gallery above the House floor. Five representatives were wounded. My father ran over from the Senate and wrested a 38-caliber pistol from one of the shooters. My brother Kevin, then in second grade, was traumatized by my mom’s terror as she stood in the kitchen, frozen, before she got word that my dad was OK... I thought about this listening to Dominique Luzuriaga, Officer Rivera’s widow, give her eulogy through sobs... Officer Rivera and his 27-year-old partner, Wilbert Mora, died answering a 911 call from a mother in Harlem who said her son had verbally threatened her. They walked down a hall in the apartment and the son jumped out and opened fire, fatally wounding both officers... [Rivera] was the class clown, but he got a serious crush on Dominique in grade school. Teachers had to sit them apart so they could focus...  When she was called to Harlem Hospital, she said, 'Walking up those steps, seeing everybody staring at me, was the scariest moment I’ve experienced.' Standing by her dead husband, wrapped in sheets, she told him: 'Wake up, baby. I’m here.' In the eulogy, she often talked directly to her husband, as though he were standing at her side: 'The little bit of hope I had that you would come back to life just to say "Goodbye" or just to say "I love you" one more time had left. I was lost. I’m still lost.'"

From "Rhapsody for a Boy in Blue" by Maureen Dowd (NYT).

To read more about that March 1, 1954 incident, here's the Wikipedia article. Excerpt: "The assailants were arrested, tried and convicted in federal court, and given long sentences, amounting to life imprisonment. In 1978 and 1979, their sentences were commuted by President Jimmy Carter."

And from "Rafael Cancel Miranda, Gunman in ’54 Attack on Congress, Dies at 89/He and three others opened fire on a crowded House chamber in the cause of Puerto Rican independence. Some saw him as a terrorist, others as a hero" (NYT, March 3, 2020):

“Can you imagine us thinking we could overthrow the U.S. government with little pistols?” he told The Militant. “I wish I could!” 

He referred to the attack as “an armed demonstration.” 

“We knew that if we went with signs, we weren’t going to get attention,” he said.