National Zoo awaits a new panda – or two, or none

[img_assist|nid=6795|title=Click on photo to enlarge or download|desc=National Zoo giant panda Mei Xiang sleeps in her indoor habitat Wednesday. Scientists say she might be pregnant, and if she is, will probably give birth within the next few days. SHFWire photo by Audrie Garrison|link=popup|align=right|width=640|height=480]WASHINGTON - Mei Xiang has a secret.


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