In a statement, the Israeli Army said, "There was an accidental burst of gunfire by the force that followed an operational error".
Microsoft took most of the day yesterday to fix "an operational error" that shut out millions of users from its group of Web sites starting Tuesday night.
Researchers say the virus was accidentally let loose before it was ready, as an operational error made the ransom payments easy to track — including by law enforcement.
What the aviation agency terms an "operational error" was ascribed to the controller, who was at the Washington Terminal Radar Approach Control at National Airport.
At a briefing in Washington on Wednesday, investigators laid out a chain of events, beginning with an operational error, that appear to have led to the accident.
Expressing regret for the attack, a senior military official said the army had intended to hit the house next door, which was a weapons storage site; the Daia home was struck because of an "operational error".
It was the second time that the controller, whose name was not released, committed an operational error and then compounded it by failing to report it, an F.A.A. official said.
In particular, we estimated an operational error rate of 0.18.
Hamilton was on pole by 0.6 seconds in Barcelona before being hit with a grid penalty because of an operational error by the team.
Then, last time out in Spain, Hamilton ran out of fuel in qualifying after an operational error and was demoted from pole to the back of the grid.
Toys R Us is blaming a price difference between white dolls and the darker-skinned "ethnic" version found in several Canadian stores on an "operational error" and says it is "absolutely not due to the dolls' ethnicity".
