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• That was the question 0 structural engineers and California transportation officials were asking themselves *T*-2 yesterday as rescue workers began the gruesome task of *-3 trying *-4 to extract as many as 250 victims from beneath the concrete slabs of [_ARG1 the double-deck Nimitz Freeway] in Oakland that *T*-1 [_rel caved] in [_ARGM-TMP during Tuesday 's temblor] .