As the U. S. struggles to get out of its housing slump, its neighbor to the north faces a different challenge: Canada's housing recovery has been so rapid that some here are worrying about a bubble.

在美国努力走出楼市低迷之际，它的北方邻国加拿大却面临着一项全然不同的挑战：加拿大的楼市复苏速度非常之快，以至于一些加拿大人担心会出现楼市泡沫。

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And here's another challenge for a soul artist in the 21st century: It's hard to top those great songs from the 1960s and '70s.

NPR: Leela James: New Soul From An Old Soul

Here's a responder to our e-mail challenge.

NPR: Could You Be the Great American Novelist?

It's going to be tough but I'm delighted to be here and really looking forward to a new challenge.

BBC: Robson relieved by Carlisle move