Andrew Rosenthal writes: Rep. Steve King, Republican of Iowa has … said that “[in light of the Boston bombings] we need to take a look at the big picture” before proceeding with immigration reform.

So, let’s look at the big picture. The slain older brother, Tamerlan Tsarnaev, had a green card, while the surviving younger brother, Dzhokhar, is a naturalized citizen. As I said, they both arrived here fairly recently.

But then, so did Lu Lingzi, one of the three people killed in the explosions. She was from China, a graduate student at Boston University who played piano and liked dogs and blueberry pancakes.

The Tsarnaevs’ 26-year-old carjacking victim was also born in China. According to a Boston Globe story on his harrowing experience “his quick-thinking escape…allowed police to swiftly track down” the brothers, “abating a possible attack” on New York City.

Guess who else was foreign born? The gas station clerk who sheltered the carjack victim and called 911. His name is Tarek Ahmed. He is 45 years old,. He told a Times reporter, Wendy Ruderman, that he is Muslim and came here from Egypt seven years ago.

Mr. Ahmed also told The Times: “I love this country. My heart goes out to everybody who is affected by this.”

The story of the Boston marathon attacks is not just about two immigrant brothers suspected of committing a horrific act of violence. It is also about the foreign residents and immigrants they victimized and those who assisted in their capture.

The “big picture” is the same as it ever was: Visa shortages and the millions of people living in the shadows, doing jobs no one else wants.