May 30, 2013
![This image provided by KFOR-TV shows storm clouds moving over Guthrie, Oklahoma.](https://gdb.voanews.com/4decb69d-8807-4d7e-a17a-a2e3e9b6c0ad_w1024_q10_s.jpg)
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This image provided by KFOR-TV shows storm clouds moving over Guthrie, Oklahoma.
![A chipping sparrow tugs on some loose threads of weathered clothing while gathering nest-building materials in a garden in Freeport, Maine, USA.](https://gdb.voanews.com/9e675f5f-905d-4965-81ac-d4275e40b372_w1024_q10_s.jpg)
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A chipping sparrow tugs on some loose threads of weathered clothing while gathering nest-building materials in a garden in Freeport, Maine, USA.
![A tourist is reflected in a glass surface as she walks in the newly-opened first floor of the Museum of the ancient Agora, Stoa of Attalos, central Athens, Greece.](https://gdb.voanews.com/8429604a-8bd5-4dd5-9eb7-c4d2870ed79d_w1024_q10_s.jpg)
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A tourist is reflected in a glass surface as she walks in the newly-opened first floor of the Museum of the ancient Agora, Stoa of Attalos, central Athens, Greece.
![Canada's Prime Minister Stephen Harper (R) walks in the Hall of Honor with Chile's President Sebastian Pinera on Parliament Hill in Ottawa.](https://gdb.voanews.com/3f6940fc-8354-483a-a476-3ccf27a6f98c_w1024_q10_s.jpg)
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Canada's Prime Minister Stephen Harper (R) walks in the Hall of Honor with Chile's President Sebastian Pinera on Parliament Hill in Ottawa.