Just a heads-up on the latest development for anyone interested:
The pilot requested assistance and permission to land due to problems with fuel indicator. You can listen to the radio exchange in the link below.
http://audioboo.fm/boos/1482009-bolivia-air-force-fuerza-aer...
[1] https://twitter.com/AP/status/352193921415254016
[2] http://bigstory.ap.org/article/bolivian-leaders-plane-rerout...
Here's the story on NYT: http://www.nytimes.com/aponline/2013/07/02/world/americas/ap...