After all, host countries have been able to contain nuclear risks in the most challenging circumstances.

In fact, it's all about frostbite and difficulty to walk and difficulty of breathing cold, challenging circumstances.

Moreover, instructors will be able to program controlled scenarios to assess how a trainee copes in challenging circumstances.

At this sensitive political juncture, this is particularly relevant to the Iraqi security forces that are often required to operate in challenging and provocative circumstances.

Finally, I wish to pay tribute to all UNAMI staff for their hard work and dedication in implementing our mandate, often in exceptionally challenging circumstances.

He commended the leadership of the Secretary General and the High Commissioner and the dedication of their staff to their very challenging mission under increasingly dangerous circumstances.

The African Union and the African Mission in the Sudan must be commended for their work in Darfur, carried out under increasingly challenging circumstances and with limited resources.

In conclusion, I would like to commend my Special Representative and all civilian and military staff of UNMIL for their contributions to the peace process in difficult and challenging circumstances.

We value the continued cooperation among the United Nations, the AU and the Economic Community of West African States (ECOWAS), as well as their contributions to advancing the peace process under these challenging circumstances.

A bit more challenging, right?

A bit more challenging, right? (Laughter)

But striking the proper balance is challenging.

That will be particularly challenging for Bernanke.

That is an assumption that needs challenging.

Emerging and challenging issues deriving from implementation

Finally, Japan s external environment today is more challenging.

However, the situation in Cité Soleil remains challenging.

Two serious problems make reconciliation in Afghanistan particularly challenging.

But success in Cairo might prove even more challenging.

This means that Europe probably faces another challenging year.

The selection of indicators has proven to be challenging.

Women challenging these norms are punished by violent means.

Emerging and challenging issues deriving from implementation and necessary

Circumstances

The year ahead will be challenging and rife with uncertainty.

Everything we do, we believe in challenging the status quo.

You can see the trapezoids are a little challenging there.

Fortunately, such a way immensely challenging but nonetheless feasible exists.

This category is especially useful for solving especially challenging problems.

In this challenging environment, administrative infrastructures have continued to function.

This has been particularly challenging in remote and insecure areas.

These have indeed been very challenging times for our Organization.

America, however, is not alone in challenging Al Jazeera head on.

Aside from clarity, it is important that group goals be challenging.

The Second Great Awakening was challenging women's traditional roles in religion.

Determining an optimal level of accountability for results is also challenging.

Some individuals and entities have filed multiple lawsuits challenging their listing.

Some local journalists and civil society groups are challenging the credibility of some of the results, and the CPC is challenging the outcome of the presidential vote at the INEC.

Participants in the Contact Group were mindful of the differences in the individual circumstances of Article 5 (1) Parties in their progress toward the phase out of methyl bromide and the need for sufficient methyl bromide in the last three years, when finding alternatives could be challenging.

Opposition leaders do not like the subject, but they avoid challenging it.

Most should be able to grow strongly, despite the challenging global environment.

Of these three imperatives, sustainability may be the most complex and challenging.

It will be challenging, but maybe also healthy for our common future.

The journey from 2011 to now has been challenging, exciting and tedious.

Managing such a large and complex peacekeeping mission was a challenging task.