WASHINGTON — Caught between kids and aging parents, the sandwich generation worries more than most Americans their age about how they'll afford their own care as they grow older, a new poll shows. But most aren't doing much to get ready. Nearly 1 in 10 people age 40 and over are "sandwiched" — they're supporting a child while providing regular care for an older loved one, according to the poll by The Associated Press-NORC Center for Public Affairs Research.