More than a billion people are disabled - that’s 15 percent of the world’s population. With a panel of leading disabled academics, campaigners and politicians, World Questions examines the challenges and opportunities facing disabled people across the globe right now. Presenter: Scout Bassett, US Paralympic athlete Panel: Ambassador Catalina Devandas: Costa Rican ambassador to the United Nations (Geneva) Yetnebersh Nigussie: Ethiopian disability rights campaigner (Kenya) Baroness (Tanni) Grey-Thompson: Former Paralympic athlete (UK) Judy Heumann: Campaigner and former advisor to President Obama (USA) Producers: Helen Towner, Steven Williams and Victoria Brignell BBC World Questions is a series of international events created in partnership with the British Council. (Image: Disability rights protesters at a rally outside a New York courthouse, Credit: Erik McGregor/Getty Images)