I had the full works, even at the small provincial airport at Green Bay, Wisconsin, and the metal detector found the stainless steel wire holding my ribs together! I am very impressed with the sensitivity of that machine!
However the checks in and out of the USA meant arriving 3 hours early at the airport to check in, and whilst I agree totally with having security precautions, I felt that they were a bit over the top compared with my experience in Europe. I thought that the USA was running profiles on suspect passengers. They applied the same strict checks to everyone however on the flights I took. In several cases the check-in took far longer than the actual flight!