"Ten years, it is a long time, but I don't think American tennis is as bad as people portray it to be, " Isner said.

CNN: March 4, 2013 -- Updated 1608 GMT (0008 HKT)

We shouldn't need data to convince us that texting and driving at the same time is a bad idea.

CNN: Ford vehicles will read you text messages while you drive

As Cohen and Rosenstein point out in their letter Friday, TD Ameritrade isn't saying a big merger is a bad idea, just that they want to take their time.

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