These two temples were built exactly facing each other in the early 19th century.

This is the same problem that many businesses faced in the last century when they had to produce balance sheets.

Economic factors that employees are facing in the 21st century have been linked to increased stress levels.

He would have been right at the great moments of international threat we faced in the 20th century.

Global warming is the most serious problem we face in the 21st century.

That gives Washington the chance to prepare for the new kinds of conflicts the country is likely to face in the 21st century.

The fight against terrorism is one of the biggest challenges that we face in the 21st century.

I urge all of you to think about this new crime against society that we are going to face in the 21st century.

It is perhaps the most important security challenge facing us in the next century.

"For me this is the most important thing we are facing in the 21st century."