At time Pentagon released news, they stated that it was not possible to say whether the aircraft was taking-off or landing. Since then, a transcript has been published of interview between journalists and commanders of B1, K10 and USS Russell, and others, timed 16:20hrs EST. In this the commander of the B1, states he had "multiple aircraft malfunctions which rendered the aircraft uncontrollable". He also refuses to state whether he was arriving or leaving.
http://www.defenselink.mil/news/Dec2...1_t1212b1.html