Most of their liabilities are short-term, so they have had little choice but to stick mainly to bombproof investments, such as cash.

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There will be 22, presumably eagle-free, bombproof stories behind discreetly disguised barricades.

WSJ: Eero Saarinen, Shaping the Future, at the Museum of the City of New York | By Ada Louise Huxtable

Only when those rivals fail is the theory bombproof.

WSJ: The Benefits of Scientific Rivalry | Mind & Matter

The vehicle was bulletproof and bombproof.

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