This is the highest percentage of Americans to mention terrorism in a decade, although it is still lower than the 46% measured after 9/11. Before 2001, terrorism barely registered as the most important problem facing the country.
After 9/11, terrorism faded as the top problem, although mentions have spiked after major terrorist incidents. In 2004, mentions rose as high as 19% after the Madrid train bombings, and then jumped again to 17% in 2005 after the London train and bus bombings. Since 2007, less than 10% of Americans — sometimes less than 1% — have mentioned terrorism in Gallup’s monthly updates, although mentions did spike again to 8% in early 2010 after the failed “underwear bombing.”