By Karen Garcia
Los Angeles Times
LOS ANGELES—If you’re planning to visit one of the 11 most popular national parks in the U.S.—two of which are in California—staff might ask a question that could be disquieting: Are you an American citizen?

LOS ANGELES—If you’re planning to visit one of the 11 most popular national parks in the U.S.—two of which are in California—staff might ask a question that could be disquieting: Are you an American citizen?