But the departures also point to the difficulty some people have working for Zuckerberg.

NEWYORKER: The Face of Facebook

But Mr Milosevic might soon have difficulty restraining some of his wilder supporters, even if he wanted to.

ECONOMIST: Kosovo

But some of the problems arise from a deeper difficulty, which could, in the end, pose a real danger.

ECONOMIST: Labour��s stumbles

There are certainly some odd difficulty spikes and valleys, but over all what makes this game so enjoyable is the combat.

FORBES: Connect

But the venture world has learned some hard lessons on the difficulty of building energy businesses: they face science risk, often take a long time to scale and can be capital intensive.

FORBES: Going Green: Investing In Consumer Focused Energy Tech

But, in a report on its implementation, the MPs said it was clear some people would have difficulty adjusting, while those used to receiving support each fortnight and budgeting accordingly would find it challenging moving to a monthly time span.

BBC: Job Centre Plus in Glasgow

She had to make friends with the country children, and perhaps explain some things to the town children who had been her friends the year before, but if she had any difficulty with that I never heard about it.

NEWYORKER: Gravel

"I don't doubt some kids are super smart, can 'spot a perv' and avoid them with no difficulty, but... not everyone has that talent, " he said.

BBC: Habbo 'muted' following explicit sex chat claims