A resident carries away a basket with belongings from a destroyed house in Mapleton, Iowa, on April 10, after a large tornado flattened a grain elevator and destroyed homes and buildings on its weekend rampage through this small western Iowa town. Authorities reported no serious injuries. Nati Harnik/AP
Destruction in Mapleton, Iowa, is shown in this aerial photo taken on April 10. The tornado was one of several reported in Iowa. The weather service said it had confirmed a total of four smaller twisters that touched down near Early and Nemaha, damaging several homes. Tim Hynds/Sioux City Journal/AP
A view of destruction by a tornado in Mapleton, Iowa, on April 10. Tim Hynds/Sioux City Journal/AP
Damage is shown in Mapleton, Iowa, on April 10. A tornado struck the small Monona County town on April 9, causing massive damage. Jim Lee/Sioux City Journal/AP
Omaha resident Lindsey Carother (l.) hugs a friend on April 10 in front of her childhood home in Mapleton, Iowa, which suffered heavy damage from a large tornado. Nati Harnik/AP
Peggy Kunkel carries a photo album she found that she believes belongs to one of her neighbors as Mapleton, Iowa, residents begin clean-up efforts on April 10, after a tornado devastated part of the town. Jim Lee/Sioux City Journal/AP
A cleanup crew removes debris in Mapleton, Iowa, on April 10. Nati Harnik/AP
Dave Witzel searches through his home as Mapleton, Iowa, residents begin cleanup efforts on April 10 after a tornado devastated part of the town. Jim Lee/Sioux City Journal/AP
Jerry O'Dell searches through debris at the home of his sister-in-law Bernice Link as Mapleton, Iowa residents begin cleanup efforts on April 10. Jim Lee/Sioux City Journal/AP
A resident in Mapleton, Iowa, stands near trees that have large metal sheets lodged in them on April 10. Nati Harnik/AP
Across some of the most crucial sectors of the American economy, there's a lack of consensus of what exactly should be considered a 'cyberincident' – and whether technical mishaps, even without malicious intent, should count. That's a problem.
The most critical sectors of the American economy were affected by 245 "cyberincidents" last year, according to the Department of Homeland Security. As high as that number seems, however, security experts caution the real number may be much higher.