| The Va. Tech shooting | 40 % |
| The Minn. bridge collapse | 26 % |
| The Utah mine collapse | 3 % |
| The Southern Calif. wildfires | 20 % |
| Other | 11 % |
| Total | 35 |
| The Va. Tech shooting | 40 % |
| The Minn. bridge collapse | 26 % |
| The Utah mine collapse | 3 % |
| The Southern Calif. wildfires | 20 % |
| Other | 11 % |
| Total | 35 |