The U.N.'s Yvo de Boer issued a stark reminder that the clock has run out.

VOA: standard.2009.12.08

He still carries a reminder of that day: a fat scar that runs from the middle of his neck to the top of his cheek, where the machete of a militiaman almost severed his head.

VOA: standard.2009.09.07

The ongoing debt crisis in Greece and other southern European countries served as a reminder at this meeting of the danger of overspending - but also of the possibility that trimming spending too sharply could plunge the world economy back into recession.

VOA: standard.2010.06.05