In a wide-ranging request for documents and analysis, President-elect Donald Trump's transition team asked the Department of Homeland Security last month to assess all assets available for border wall and barrier construction.

The team also asked about the department's capacity for expanding immigrant detention and about an aerial surveillance program that was scaled back by the Obama administration but remains popular with immigration hardliners. And it asked whether federal workers have altered biographic information kept by the department about immigrants out of concern for their civil liberties.

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The requests were made in a Dec. 5 meeting between Trump's transition team and Department of Homeland Security officials, according to an internal agency memo reviewed by Reuters. The document offers a glimpse into the president-elect's strategy for securing the U.S. borders and reversing polices put in place by the Obama administration. 

Trump's transition team did not comment in response to Reuters inquiries. A spokeswoman for the Department of Homeland Security and U.S. Customs and Border Protection declined to comment.