The claim

“Is NASA looking to return the last SR -71 blackbird”

There is no credible public evidence that NASA is currently seeking to “return the last SR-71 Blackbird,” and the claim appears to reflect rumor or misunderstanding rather than a documented NASA plan.

NASA previously operated SR-71 aircraft (notably NASA 844) for research in the 1990s, but those aircraft were retired and transferred to museums or other custodians under formal disposition processes. Major NASA aircraft acquisitions/transfers are typically documented via NASA history pages, press releases, or public records; no such widely cited, current documentation supports an active effort to “return” an SR-71. The phrase “last SR-71” is itself ambiguous: multiple SR-71 airframes survive in museums, and the "last" could mean last produced, last flown, or last in a particular collection. If you can share where you saw the claim (article/post/date, or which airframe and from which museum), it can be checked against specific transfer records and authoritative statements.