Here is the website of an exhibition that will run through March 28. There is also a weekly lecture series to accompany the event, the first few of which have been posted at the site. Here is the first one:
Introduction to the Silk Road by Nancy Steinhardt
The Tarim Basin Mummies by Victor Mair
UPDATE: Mair is mistaken when he states that Tocharian is the 2nd oldest language after Hittite.