Someone is driving on the freeway at night going 75 wearing the smart contacts. As a van is passed on a curve all the LEDs in the contacts light up fully. "Single car crash", states the report, "must have fallen asleep".
Gives new meaning to BSOD!
And what happens if the nuclear part were to separate over the United States and accidentally detonate? Oops!
It would be devastating of course. The US economy would collapse, and then the entire world economy would collapse with it. Imagine the aftermath of 9/11 multiplied a thousand fold. Russia would fall in to chaos as first it's economy, then its government crumbled.
The big countries understand they are too interconnected to directly war each other. That's why we have Afghanistan.
Even if I'm immunized, can't I be a carrier?
I am not a doctor, blah, blah...
I don't think you can be a carrier of a virus the way you can a bacteria (i.e. Typhoid Mary)
The flu is spread through it's own symptoms: coughing, sneezing, runny nose, watery eyes. If you don't have symptoms, you won't spread the virus.
The same good habits, washing hands and covering your cough, should cut down any small risk of a healthy person being a transfer agent between two other people.
As for the cloning.. yes, that is of course an issue. But there are always tradeoffs to technology. And there are ways to minimize exposure, such as only transmitting an ID number instead of full personal details, which will be matched to your entry in a secure online database.
It's that "Secure Online Database" part that catches in my throat.
One good reason why computers can do more work than people is that they never have to stop and answer the phone.