Recently, this story was covered by members of the world press. The loan period now expired, half of the barrack - originally from the Theresienstadt familienlager, located in sector BIIb, shall now be returned to its original location and the preservation team at Oswiecim will begin the lengthy process of reconstruction and representation. See links below for more details:
Auschwitz-Birkenau - Loaned historical barrack returned to Poland
Auschwitz barracks returns to Poland from the US
U.S. Holocaust museum returns barracks to Auschwitz | Jewish Telegraphic Agency
1) The portion of barrack pictured whilst on loan to the USHMM (United States Holocaust Memorial Museum).
2) A recent image taken during a further study visit to the site - image shows the entrance gates to camp BIIb, the Theresienstadt family camp.
CREDIT - AUSCHWITZ-BIRKENAU MUSEUM and USHMM