The situation along the southern border is being called a national security threat.

VOA: special.2009.03.14

Lately he worried about a new threat, a fungus called Ug99.

VOA: special.2009.09.22

Jozy Altidore has been called the United States' biggest goal-scoring threat.

VOA: special.2010.06.09

Aside from so-called "rogue" nations like North Korea, he said Asia was also under threat from extremists.

VOA: standard.2009.05.30

The rebellion has become increasingly violent. Worried by the growing security threat posed by the Maoists, the government is preparing to mount a big security operation called Operation Greenhunt to take out the insurgents.

VOA: standard.2009.11.04

He called the threat serious and significant.

VOA: standard.2010.02.07