A、Mr. Khamisa’s son was killed by Mr. Felix’s grandson. B、Mr. Khamisa put Mr. Felix’s grandson into prison. C、Mr. Khamisa’s son

An organization based in the United States honors people who, in its words, "stick their necks out for the common good." That means they take a risk. The organization is named for the animal with the very long neck. The group is called the Giraffe Project.
Phil Borges is among recent "Giraffe Heroes." He is a doctor who fixes people’s teeth, but he is also a photographer. Mister Borges started an organization called Bridges to Understanding. It sends photographers to small villages to give cameras to children and teach them how to take pictures. Bridges to Understanding has sent photographers to Peru, the Arctic, Kenya, Nepal and India as well as a Native American village in Arizona. The Giraffe Project says Mister Borges stuck his neck out to connect children all over the world with photography.
Two other Giraffe heroes are Azim Khamiea and Plez Felix. They live in California. Members of a street gang robbed and killed Mister Khamisa’s son Tariq. He was 20 years old. The young man who killed him was Mister Felix’s 14-year- old grandson, Tony. He is now in prison. Plez Felix apologized to the Khamise family for the actions of his grandson. He end Mister Khamisa now work together to tell young people that killing and violence do not solve problems.
Since 1982, the Giraffe Project has named more than 900 heroes. These "Giraffes," as they are aim known, do not receive money. Instead, they are presented as examples for others to follow. Their stories are told through the news media, schools and the Internet.
What does the phrase "stick their necks out for the common good" mean?

What is the connection between Mr. Khamisa and Mr. Felix?