Smile! It's a terrorist attack!
A "selfie" is a photo taken at arm's-length by a cell phone or other digital device, and then (more often than not) posted on social media. A selfie device has been invented to stretch the distance between the subject and the camera. There has even been a song called "#selfie" (that once heard, can never been unheard).
During a hostage crisis in Sydney, Australia on Monday, two hostages lost their lives. The manager of the café that was under siege grabbed the gun from the gunman and wrestled it away from him. The manager, Tori Johnson, was shot and killed, but that act allowed some of the others to escape, according to London Evening Standard. The second victim, Katrina Dawson, was a mother of three, according to The Telegraph.
That hasn't stopped people from posting selfies from the site of the tragedy.