Inside Story investigates missionary work and how destinations are chosen to provide aid.
The burial is taking place now that the Taliban has freed all South Korean hostages.
The two deaths came as negotiations stalled over a demand by the Taliban that eight of its fighters be freed.
The Taliban had released two hostages in August as a goodwill gesture after beginning direct talks with the South Korean government.
All 19 others were freed last month and returned home on September 2.