Dear Editor: I'm a teenager and I agree with President Nixon. I think he made the right decision in sending U.S. tr00ps into Cambodia. If the Communists have sanctu- aries in Cambodia, all they have to do is cross the border and attack U.S. troops in The U.S. South Vietnam. troops are surrounded on three sides. In the north, there are the Viet Cong in North Vietnam; in the west they are in Cambodia and the Pacific is on the east side. It's too bad that the rioting minority makes headlines and the silent majority is ignored. A concerned teen (Karen-Boes) . ,4 .. f, way f/f? I ,3 2 C, II In(iv? no ski??2!?ch [a Cw 1 xewcz 'Zkac_