In a national survey, U.S. residents said that the biggest global threat to the country today will come from extremist militant groups or nations. But they nevertheless said that other big threats include pandemics and global climate change.

This survey reflects a change from last year. War and violence are rated as a bigger threats today than economic issues (though Pew did not ask people whether EU economic instability was a threat this year). Both years, people listed China's emergence as a world power as a threat, and in 2014 this is the sole economic concern on the list of global threats.

What this suggests, as we move into an election year, is that many of the fears that haunted the nation in the early 2000s have come to the fore again. The mortgage crisis and Occupy movements are receding into memory, and we are once again riveted by fears of terrorism.

Read more on the Pew Research Center site.