According to the NTSB 32367 is the estimated number of highway related fatalities recorded by the US department of trans­porta­tion during 2011. 11981 (that is 37%) of those 32367 fatalities were due to incidents involving passenger cards.

For reference the estimated number of aviation related fatalities for the same period was 494. Ad­di­tion­al­ly, 0 of those aviation fatalities occurred on airlines (i.e. most of the fatalities occurred due to incidents involving private planes).

Finally, what about the number of deaths of US citizens worldwide due to terrorism? According to the US Department of State: 17. Obviously this figure does not include military deaths–see the linked page for a precise definition of US …continue.

1962 was the year a coal mine started in Centralia, PA that could po­ten­tial­ly burn for some time yet to come. The fire caused most people in the town to evacuate by the mid-1990s leaving a few who decided to stay. It is literally a slow, smoldering, un­der­ground hazard. According to the linked article there are a number of ongoing un­der­ground and surface coal fires in the US.

Marsh­mal­lows anyone?

58,027.6 is the population per square mile of Guttenberg, NJ in 2012. Guttenberg edges out a number of other locations in the US to be the most densely populated city in the US.

For reference the population density of NYC was 27,543.1 during the same time period.

12.07% is the percentage of single active duty women with children relative to all active duty women in the armed forces as measured by a US Department of Defence data release. As an aside the same data release shows that 4.24% of active duty men in the armed forces are single with children.