Here's some audio of UAL 956 which diverted to BOS after a report of a suspicious device. The clip starts with Boston Approach. Edited for relevant comms...Some transmissions seemed to be cut off a little in the beginning.
Apparently one of the F-15 escorts had to declare an emergency as well, after a total avionics failure, but this is not confirmed. http://www.nycaviation.com/2012/07/united-flight-diverted-to-boston-due-to-bomb-scare/#.UBiqejGe4qkhttp://www.boston.com/metrodesk/2012/07/31/united-airlines-plane-bound-for-switzerland-diverted-logan-airport-boston/JeUiIdW4kn6fVDzEU4g1jM/story.html