Some ways of getting involved are:
-voting (here for the experience, ask yourself if you have the right to vote? does your family vote? your friends?
-participating in political campaigns (do you know anyway that participated in a campaign? You can also do it unofficially, for example even by posting Facebook posts about a candidate!)
-belonging to a party - do you know anyone in a political party?
The question asks about your personal experience so I can only give you tips how to answer this about yourself!
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North Vietnam launched an invasion of South Vietnam. ... The attack of two U.S. destroyers by the North Vietnamese.
On beaches. beaches have sand and other rocks that make up conglomerate :).
