Two major events in the US in 2007 were the global financial crisis that led to the recession and the Virginia Tech shooting, one of the deadliest mass shootings in American history.
yes
Since 1980, the number of mass shootings in the United States has varied significantly, with estimates typically ranging from several hundred to over a thousand, depending on the criteria used to define a mass shooting. Organizations like the Gun Violence Archive have tracked these incidents, noting a marked increase in frequency in recent years. The definition of a mass shooting can differ, with some considering incidents involving four or more victims as qualifying. Overall, it’s a complex and evolving issue that reflects broader societal and gun-related challenges.
Since you don't specify which shootings in America you are referring to, it's not possible to determine if there is a US/UK fanfic about them. On the other hand, there are fanfics about so many things it is likely that someone, somewhere, has written a fanfic about the shootings you have in mind.
Father's Day is on June 19th in the US in 2016.
Since 2000 there has been about 35 school shootings in the USA, not all of which resulted in victimised deaths. 4 of these incidents including 10 or more deaths. I hope you were referring to the US in this question.
There were literally millions of shootings in the 1960s and 1970s. Consider all the wars in so many places on so many continents during that period. Even if you count only fatal shootings, the number is incalculably great. Millions were killed in Cambodia alone, though many of those killings were done with non-firearm weapons, and thus were not technicaly shootings, Deaths from shootings, machete hackings, and bombs are difficult to differentiate. The Asian and African wars during the period produced millions of casualties. Criminal and police shootings accounted for hundreds of thousands more. Perhaps you mean famous shootings? This would depend on where they took place. The more unusual, and the more significant a political shooting, the more famous it will be. The handful of political shootings in the US during the period is tiny compared the the numbers of political killings in Asia, Africa, and the Middle East, but are more famous because they were more globally significant, and in general happened much less often.
A total of 40 as of 8.12.16.
The land mass of the US has an area of 9,161,922 square kilometers.
March 13 2016
March 13 2016
A quarter (25 US cents) has a mass of 5.67 grams.