JCK Las Vegas can be a whirlwind of business and socializing. But sometimes events during the week strike a deeper chord, as when two speeches put a human face on the industry’s charitable efforts.At the Diamond Empowerment Fund’s May 2 “Diamonds for Good” panel, 21-year-old Democratic Republic of Congo native Joseph Munyambanza told of being forced to move into a refugee camp at age 6. Determined not to let his circumstances define him, he studied hard even though he often went for days without a meal.As a teenager, Munyambanza and some friends put together Cobras, a mentoring school for young people at the camp. “We did not have money to pay school fees, but we encouraged those who dropped out of school to go back,” he said. “Grades began to improve, and more children were attending school.”“Sometimes, we had no food,” he continued. “We struggled to get money for