A woman walks past artwork at tech company Twitter's office space in Santa Monica, California, on April 7, 2015. AFP PHOTO / JONATHAN ALCORN / AFP / JONATHAN ALCORN (Photo credit should read JONATHAN ALCORN/AFP via Getty Images)
A woman walks past artwork at tech company Twitter's office space in Santa Monica, California, on April 7, 2015. AFP PHOTO / JONATHAN ALCORN / AFP / JONATHAN ALCORN (Photo credit should read JONATHAN ALCORN/AFP via Getty Images)