Third, plaintiff lawyers will have to surmount several obstacles before they can bring a case.

ECONOMIST: Environmental risks

But if he is to do the astonishing and win, against the odds and despite the fact that Democratic voters are more fired up than the disconsolate Republicans, Mr McCain still has to surmount some sizeable obstacles.

ECONOMIST: The presidential race

In practice, they have lots of obstacles to surmount.

ECONOMIST: Online payments

But while the early trials of this filtering technology look promising, there are several obstacles that the researchers need to surmount before their product can be commercialised.

ECONOMIST: MONITOR

That is one of many obstacles that Mr Christofias will have to surmount if he is to persuade a majority of his voters to take risks for peace.

ECONOMIST: Cyprus

These are obstacles inherent in the source of the energy that will be difficult to surmount.

WSJ: The Experts: What Renewable Energy Source Has the Most Promise?