An overdue reckoning? It's more than just Jacob Zuma on trial and it's about more than the bribery scandal involving French arms maker Thales. Opening day in court comes more than 20 years after the case was first opened. We ask about the specifics of a deal that led to the conviction of a Zuma former advisor in 2004, long before he became South Africa's president. Any trial of a former head of state is always a test for a nation's institutions.