Regarding homeland security and that one percent and for some added perspective.
Oftimes a question raised as to whether the US Military would follow orders if it involved shooting dead fellow Americans,
Since the year 1900 52 people have been killed at the hands of the Police in the United Kingdom. (This exclusive of bloody sunday and such incidents in North Ireland during the troubles where the killings were done by paramilitary forces. Even were those added it would not change the point being made here)
52 people is is less then .5 a person each and every year and if one adjust for population size it would be about 2.5 people per year on Average.
in March of this year ALONE 111 people living in the United States of America were killed at the hands of the police. This translates to some 1300+ for a year. People living in the USA are 500+ times more likely to be killed by the police then those living in the UK and no this can not be because of "ethnic differences".
There something seriously wrong with law enforcement in the USA. If I was 500 times more likely to be murdered in one neighborhood than another I would think seriously about moving. I would also be rather leery about the notion that "US soldiers would not fire on their fellow citizens" because those cops seem EAGER to do so.