PROTECTIONMassive Attack: Mushroom, 3 D, Daddy G. Additional personnel: Nicolette, Tracey Thorn, Tricky, Horace Andy (vocals); Chester Kamen (guitar); Craig Armstrong (piano); Rob Merril (drums). Massive Attack's sophomore effort could never be as stunning as Blue Lines, and a slight drop in production and songwriting quality made the comparisons easy. Still, from the first two songs Protection sounds worthy of their debut. The opening title track is pure