But that day I saw her from the window of the bus, I almost yelped aloud -- not just with worry, with love.

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That is a worry most countries would love to have, as they see their brightest students and academics follow the money to the United States.

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Some historians, however, worry that all of this "Lincoln love" is a bit much.

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Bull markets love to climb those walls of worry.

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So summertime is usually not the best time for stocks, but bull markets do love to climb a "wall of worry, " and the bad seasonality is just another brick.

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