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Boeing hopes the MAX will be recertified for commercial service this summer, but the FAA has yet to approve the new software, and there is no deadline for doing so.

Both countries have always had strong economic ties.

Borrowing to cover operations could be risky because money raised through the sale of bonds wouldn't be used to upgrade physical assets such as signals, stations or purchase new subway cars or buses.

Both corn and wheat are major food supplies for livestock, he said, and higher corn prices forced livestock producers to purchase more wheat as a substitute, which boosted wheat prices.

Born into an ordinary family in Xiamen, Chen became a factory worker in Jiangxi province after graduating from junior high school in 1966 when the "cultural revolution" (1966-76) began.