Sister of MH17 victim: I'm just trying to keep it together for my parents

Andrei Anghel was on his way to Bali to celebrate the end of his second year of medical school when he was killed on Flight 17. His sister Alexandra shared her memories with Anderson Cooper. She says Andrei went into medicine because he always wanted to help people and aspired to make a difference in the world.

AC360 is remembering the victims of Flight 17 by sharing their stories.