This is already in the making...
www.abovetopsecret.com...
"(a) OBLIGATION FOR YOUNG PERSONS- It is the obligation of every citizen of the United States, and every other person residing in the United States,
who is between the ages of 18 and 26 to perform a period of national service as prescribed in this Act unless exempted under the provisions of this
Act.
(b) FORM OF NATIONAL SERVICE- National service under this Act shall be performed either--
(1) as a member of an active or reserve component of the uniformed services; or
(2) in a civilian capacity that, as determined by the President, promotes the national defense, including national or community service and homeland
security. "