Four Philadelphia high school alumni have sent a 1960s yearbook to one of their most famous schoolmates, Prime Minister Benjamin Netanyahu. The Philadelphia Daily News reported Wednesday that David Gorewitz, Sam Katz, Bonnie Mason and Chuck Langerman, members of Cheltenham High School's Class of 1973, collaborated on sending the Israeli premier his yearbook. The yearbook noted that Netanyahu was on the debate and soccer teams and the chess club while at Cheltenham. Netanyahu completed school in 1967, around the time of the Six-Day War, and returned to Israel to join the Israel Defense Forces, causing him to miss out on graduation and his yearbook. None of the four knew Netanyahu personally, but in April, they sent him a note congratulating him on winning his fourth term as prime minister in the March Knesset elections. They were unsure he would even receive the package, let alone respond, but Netanyahu replied in June with a personal card. "Thank you for your kind message of congratulations and support. I appreciate your sending me the copy of the Cheltenham High School yearbook. It brought back many fond memories," the card read. "I expected a form letter," Gorewitz, who mailed the package to Netanyahu, told the Philadelphia Daily News. "When it was a personal card, I was kind of surprised. We thought it was nice that he took the time."