Fresh Air Weekend highlights some of the best interviews and reviews from past weeks, and new program elements specially paced for weekends. Our weekend show emphasizes interviews with writers, filmmakers, actors and musicians, and often includes excerpts from live in-studio concerts. This week:

An estimated 100 million sharks are killed every year, "largely due to their inherent vulnerability, and an increasing demand, particularly for their fins, in the Asian market," a new report finds.

Van Cliburn thawed out the Cold War.

He went to Moscow in 1958 for the first International Tchaikovsky Competition. When he sat down to play, Russians saw a tall, 23-year-old Texan, rail thin and tousle-haired, with great, gangly fingers that grew evocative and eloquent when he played the music of the true Russian masters — Rachmaninoff, Tchaikovsky, and Borodin.

Cliburn died Wednesday at his home in Fort Worth, Texas. He was 78.

Wall Street hardly seemed rattled by the $85 billion across-the-board spending cuts that went into effect Friday. As just one indicator, the Dow closed the week within 100 points of hitting an all-time high. For more, host Scott Simon talks with New York Times columnist Joe Nocera.

College basketball is just two weeks from its biggest day, Selection Sunday. But with three top-five teams losing this week, it seems nobody can hang onto the No. 1 spot. In the NFL, a potential draftee has reported controversial news from the combine: Teams have asked him about his sexual orientation. Host Scott Simon and Howard Bryant of ESPN.

Many music lovers know Juan de Marcos González as the man who teamed up with guitarist Ry Cooder to create Buena Vista Social Club. But González was busy celebrating the history of Cuban music long before Cooder arrived on the scene.

Concurrently with the Buena Vista project, González was recording an album with his own band, The Afro-Cuban All Stars. The orchestra now contains expatriate Cuban musicians, young and old alike, from around the world.

Tunisia took the lead in the Arab Spring back in 2011. Its revolution was swift and largely peaceful. Within months, an assembly was elected to write a new constitution.

As other Arab countries grew more violent and chaotic, Tunisia seemed to be showing the way for an orderly transition away from authoritarian rule.