There is a new report made partially available that confirms what some other people have been saying:
Earlier this year, Pakistani journalist Hamid Mir said al-Qaida may already possess portable nuclear weapons. He attributed the claim to a 2001 interview with bin Laden’s second-in-command, Ayman Al-Zawahri, in which the al-Qaida figure said the group had purchased such bombs on the black market in central Asia for $30 million US.
The good-news/bad-news is that they don’t have a very long ‘shelf life’. If they aquire a backpack nuke they may need to use it or loose it.
The report notes that Russian officials and nuclear scientists have argued in the media it would be almost impossible for al-Qaida to posess such devices, as they are too difficult to maintain and have a lifespan of just one to three years.
My contention is that if they can aquire a nuke they can find someone to maintain it for them too. Stay away from D.C. during the inauguration and the State of the Union Speech. Other large populations centers might be targets in part of a cooridinated attack.
Of course this is all just speculation on my part. Sleep well.