And so they're just going to keep going until they get to a specific point to call a halt for another phase of the operation.

CNN: Grange: Troops 'on a high'

The outcome of more than five hours of meetings in Moscow involving President Vladimir Putin, Kerry and Lavrov essentially bring diplomatic efforts to halt Syria's violence to a point they were about a year ago.

NPR: US, Russia Seek To Revive Peace Plan For Syria

Output growth slowed to a halt in the second quarter, business surveys point to further weakening during the second half of this year, and the labour market has softened.

BBC: Central banks' official statements

Annan's six-point peace plan also calls for a halt in violence by both sides and a Syrian-led political process to end the crisis.

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The halt in the fighting was part of a six-point plan devised by Kofi Annan, the UN and Arab League special envoy for Syria.

ECONOMIST: A peace plan comes into wobbly effect

Romney also made a point in both speeches of calling for a halt of all nuclear enrichment by Iran, aligning himself with Israel's insistence that Iran must have no nuclear capability.

CNN: Romney talks tough but differs little from Obama on Iran

Finally, a point is reached where the slightest nudge can bring the whole system grinding to a halt.

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In 1994, when Mr Savimbi was on the point of possible capture, the politicians signed a peace agreement and ordered the soldiers to halt their advance.

ECONOMIST: Angola