This time, though, no human intervention was required; the door closed on its own.
In the past, high-profile diplomatic intervention was required to free detained Americans.
By then, his intervention was required to restore the lead, Celtic having allowed a shocking equaliser.
In the Balkans, for example, the Clinton administration was too reluctant to use force, even though military intervention was required.
Presidential intervention was required to settle that argument.It got worse from there.
But General Alon said the current rate of intervention was required to maintain intelligence dominance.
But soil compaction continued, and in 1926 more intervention was required: Hemlock seedlings were planted.
Instead, manual intervention was required for any final adjustment of position or other corrective action necessary.
While the resulting free-kick amounted to nothing, moments later Vidic's intervention was required to clear lines after successive mistakes from Smalling and Ferdinand.
When the furious, but equally culpable, keeper shouted abuse at his team-mate, Collins responded in kind and the referee's intervention was required.
According to this view, a preserve needed to be planted, pruned, and mowed, and the bigger the preserve, the more intervention was required.
