Politics needs to focus on the 'big things', says philosopher Michael Sandel.
The US needs to better target its use of drones says foreign policy expert Joseph Nye.
Zainab Bangura, UN representative on sexual violence in conflict, discusses rape and war.
Whistleblower Thomas Drake talks about his concerns over secret surveillance in the US.
Nate Silver is seen as a political astrologer with an uncanny ability to get it right.
Pravin Gordhan, South Africa’s finance minister on the decision to end aid to his country.
- Sir Alan Parker: Appalled how films censored in China Duration: 02:04 Sir Alan Parker
- Labour could do a 'deal' with Lib Dems - Alan Johnson Duration: 00:46 15/05/2013 GMT
- Michael Sandel: I want politics to be about big things Duration: 03:17 Michael Sandel
- Joseph Nye: Too much use of drones Duration: 02:21 Joseph Nye
- Why rape is used as a weapon in war Duration: 04:41 Zainab Bangura
- 'Life is messy - I give you the odds' Duration: 02:40 Nate Silver