Grandmother sat outside, as she was wont to do every day.

She saw her granddaughter walking toward her, and she noticed the young girl seemed angry.

She was kicking the dirt, and Grandmother could see there were streaks of tears running down her face.

Margaret Heffernan is an entrepreneur, Chief Executive and author. She was born in Texas, raised in Holland and educated at Cambridge University.

She worked in BBC Radio for five years where she wrote, directed, produced and commissioned dozens of documentaries and dramas.

Here are 14 provocative quotes from her TEDGlobal 2012 talk:

Susan notes: Three years ago, on June 20, 2009, Neda Agha Soltan died in revolutionary Tehran. The following day, I watched in horror as her dying moments were replayed for the world to see, and I became a supporter of the Green Movement for change in Iran.

Today, Neda will be mourned by hundreds of thousands worldwide, and we will hear the echo of her silent death in the street in Tehran.