Russ Defending Castro Would Be Invasion' Fr*m 0«r I^ewi wAk* WASHINGTON - Deferise Secretary Robert S. McNamara would consider it “an invasion” if Russia shipped more tronos to crush a ^olt against Fidel Castro, it was disclosed today. la previously seeret testi-mony reieaigd today, McNamara said it Rossia attempted ‘ to use the same strategy it 'imd The Weather B.l. WmIIw tartaa Cloudy and warmer