posted on Oct, 26 2005 @ 11:15 PM
I would say...Integration.
Getting everything into place and having it work well. The US continually make changes (some minor, some not) to their carriers, learn what you liked
about the last one, and what you didn't like...and try and fix all the problems on the next one.
China may have jets, radars, people, missiles, the powerplant, etc...the list keeps going on and on, but the hardest thing is putting them all
together to work in conjunction with eachother seemlessly.