Using the most recent webpages you can find try to determine how many people were killed in the latest fatal tornado to hit the US?

Unless a killer tornado has happened fairly recently, the best data can be found at the Storm Prediction Center's Annual Fatal Tornado Summaries. For recent tornadoes, online news articles are usually fairly reliable, but sometimes fail to separate death tolls if there are several killer tornadoes in a day or fail to distinguish between tornadic and non-tornadic deaths. Wikipedia often does a fairly good job of doing that.

As of June 28, 2014 the latest killer tornado is not listed by the Storm Prediction Center yet. That tornado hit Pilger, Nebraska on June 16, killing 2 people.