On Monday, the power supply to pumps that inject coolant water into damaged reactors was accidentally cut, although a backup system kicked in immediately.
Some 19 US underground tests are known to have vented accidentally and, although the Amchitka site is structurally tougher than that in Nevada, the possibility of accident and of widespread radioactive contamination must exist.
It was presumably carried from Europe or the Mideast by an infected traveler, bird or accidentally imported mosquito, although scientists doubt that mystery will ever be solved.
Although plotters accidentally killed the army commander, the coup never got off the ground.
During the Franco-Prussian War, he accidentally killed a comrade; although there was no legal action, this event led him to question the meaning of life.
And although I accidentally broke my grandfather's tenet to avoid medals, I'm pretty sure he would have overlooked the rule just this once.
Once his adventuring days were over, Voynich became a book dealer a good one, although he once accidentally (one hopes) sold a forgery to the British Museum.
Although if you accidentally stumble into that pseudo-swanky and generally soulless bar in, say, Moorgate or Bank you will quickly find that the £5 you hand over to pay for your pint won't yield any change at all.
Snow, whose previous experience of drugs was being "passed the odd spliff of cannabis" in the distant past (although he did accidentally drive down the M40 on acid), said he felt "utterly bereft" after inhaling the first of "two huge balloons of the stuff" for Channel 4's Drugs Live programme in March.
Although the government accidentally revealed that Snowden was the target of its investigation when it left his email address unredacted in a March court filing, Levison has remained unable to speak about it.
