A mobile phone screen showing the tweets following the explosions that hit the Boston Marathon on the 15th April 2013.

- Image ID: D6A86E
A mobile phone screen showing the tweets following the explosions that hit the Boston Marathon on the 15th April 2013.
Jonny White / Alamy Stock Photo
Image ID: D6A86E
A smart phone screen showing the Twitter reactions to the explosions that hit the finish line of the Boston Marathon.
Location: Johannesburg, Gauteng, South Africa.