It has been a long day for Yemen watchers, but before I sign off for the evening I wanted to post the important paragraph from a statement from Yemen's embassy in the US:

The Immigration and Passport Agency has confirmed that Umar Farouk Abdulmutallab was in Yemen during the period from early August to early December 2009 after obtaining a visa to study Arabic at a language institute. He has previously studied in the same institute. His passport had a valid U.S. visa and other foreign visas. There was nothing suspicious about his intentions to visit Yemen, especially considering he had also visited the U.S.
in the past.