Although PND's hasty Instagram arguably nearly sparked a tragedy, the picture here is less of a cad than of a man wrestling with his feelings in an overfamiliar (if wildly successful) sonic bubble.
As with any developing story, events are fluid, and information comes out slowly, and it was reasonable to believe that protests in reaction to a video sparked the tragedy that led to the deaths of four Americans.
This tragedy sparked Roy Medvedev's lifelong interest in the Soviet political system and its history.
The tragedy sparked fierce arguments over the commercialisation of mountaineering on the world's highest peak.
The tragedy sparked intense national mourning in the US and a fierce debate over violent imagery used in political discussion.
She is one of the authors of the forthcoming "Glimmer of Hope: How Tragedy Sparked a Movement," from which this essay is adapted.
The tragedy sparked a bout of earthquake diplomacy, with Indian and Pakistani leaders pledging to work together across the line of control which divides the territory.
The tragedy sparked outrage and anger, and the emotions were directed at the Supreme Council of the Armed Forces, or SCAF, which rules the country and has been seen as prevaricating on handing over executive power to a civilian authority.
But in the case of gun control, a pattern has become persistent: A tragedy sparks an outcry for common-sense gun laws and gun groups are set back on their heels, but by the time Congress gets around to taking action, the National Rifle Association has regained its legislative stranglehold.
Palin's initial response to the tragedy sparked criticism from both sides of the aisle.
Her latest works, grim, pencil-drawn portraits, mark a transition in medium and content, sparked by sudden tragedy.
