You need an engineering degree, because today all guns are designed by private companies.
It didn't used to be that way. The action in the M1 Carbine was invented by someone who taught himself gun design...while he was in prison serving a 20-year sentence for second degree murder.
1+ to 2 years of colledge
to become a food designer it takes 20 years
about 5 or6 years
It depends really
over one million years
5 to 7 years
For as long as possible if you whant to become really good
About 2 to 3 years.
9 yrs my dads one
Train and train! If you want to be a long distance runner you have to have a lot of stamina, strengh and speed.
To become a fashion designer you have to, first find a fashion school that works for you, next apply to a school, and then a lot of other things. If you want more info or the full list of steps, please go to: http://www.fashion.net/how-to/fashion designer/.
to become an astronaut, you'll need to pass many tests and train for a long time and you have to be fit.