Abba Tor, The Engineer Who Made Eero Saarinen's TWA Terminal Even Better, Has Died At 93

"'Concrete is dumb,' Mr. Tor said. ... 'It doesn’t know for whom it is being poured.' Engineering necessity gave birth to one of the most inviting facets of the terminal’s undulating interior: ribbons of skylights along the joints that were opened among the four vaults. The skylights turn what might have been a heavy blanket into something luminous and billowy."