'I have not lost my voice': Gabby Giffords moves audience with impassioned plea for gun safety
Image via screengrab.

At the Democratic National Convention, former Rep. Gabrielle Giffords (D-AZ), who was gravely wounded during a mass shooting in Tucson and became an impassioned gun control advocate following a long and painful recovery, moved onlookers with an impassioned speech, saying "I have not lost my voice ... We can let the shooting continue, or we can act."

Commenters on social media reacted with emotion, and resolve.