Where are all the Tu144,s

Doing some reading online and only just found out NASA was doing some work with the supposedly retired "Russian Concordes".
Did one stay in the states or did they all stay Soviet side?

Use by NASA In the early 1990s, a wealthy businesswoman, Judith DePaul, and her company IBP Aerospace negotiated an agreement with Tupolev, NASA, Rockwell and later Boeing. They offered a Tu-144 as a testbed for its High Speed Commercial Research program, intended to design a second-generation supersonic jetliner called the High Speed Civil Transport. In 1995, Tu-144D No. 77114 (with only 82.5 hours of flight time) was taken out of storage and after extensive modification at a cost of US$350 million, designated the Tu-144LL (where LL is a Russian abbreviation for Flying Laboratory, Russian: Letayuschaya Laboratoriya, Летающая Лаборатория). The aircraft made a total of 27 flights during 1996 and 1997. Though regarded as a technical success, the project was cancelled for lack of funding in 1999. This aircraft was reportedly sold in June 2001 for $11M via an on-line auction, but the aircraft sale did not proceed. Tejavia Systems, the company handling the transaction, reported in September 2003 that the deal was not signed as the replacement Kuznetsov NK-321 engines from a Tupolev Tu-160 bomber were military hardware and the Russian government would not allow them to be exported.[17] In 2003, after the retirement of Concorde, there was renewed interest from several wealthy individuals who wanted to use the Tu-144LL for a transatlantic record attempt, despite the high cost of a flight readiness overhaul even if military authorities would authorize the use of NK-321 engines outside Russian Federation airspace.[citation needed] The last two aircraft remain in Gromov Flight Research Institute in Zhukovsky, Nos. 77114 (the Tu-144LL) and 77115. In March 2006, it was reported that both aircraft would be preserved,[18][unreliable source?] with one erected to a pedestal near Zhukovsky City Council or above the Gromov Flight Research Institute entrance from Tupolev avenue.

a reply to: Blackfinger

Everything was done at Zhukovsky.

a reply to: Blackfinger

One is in a german museum, next to a Concorde.

Looks pretty awesome:

sinsheim.technik-museum.de...
upload.wikimedia.org...