freeman3
And Ricky I don't think the federal government is linking up those data sources (or can) right now
If you can make a list of information that can and should be tracked, the authorities have...and do.
I've traveled across the border with people from Iraq and Pakistan and right at the border they are asked about recent travel . (To Pakistan and Jordan) Its contained right in their digital file that is connected from their passport.
Its certainly not fool proof. What is?
Of your points, point 4 is not wholly traceable. Gun purchases.
There is no central form of gun registry or purchases in the US. The NRA fights that and most of Congress won't support such.
You can buy guns anonymously. And the San Bernadino couple did so.
You can also visit internet sites, but the technology exists to track visitors who have not taken extraordinary steps to ensure their anonymity. But the question remains about how much privacy Americans will surrender in search of complete security. And whether that sacrifice will actually contribute to safety significantly. The budget for the NSA is 52.6 billion dollars.... Annually.
What if more of that money was spent on things that contributed positively to most peoples lives rather than on security that can never be 100%?
However, if gun ownership was licensed, specific guns registered and all gun transfers required to be registered then your database would be better. And securing the weapons for a terror event would be more difficult. And it would be easy for the authorities to seize illegally held guns and get them off the streets and out of circulation..
But nothing is completely fool proof. And since there is far more danger to Americans from shooters who are neither Muslim, or foreign .... you are focusing all the effort on only a small part of the actual risk. At least the gun controls would have a dampening effect on the young, white male christian school/church/mall shooters too. (But still would not be fool proof)