Seeing out of from the inside of an invisibility cloak requires the invention of an anti-cloak (Image: Shanghai Jiao Tong University/Hong Kong University of Science and Technology)
Theoretical physicists think they might have the makings of the world's first 'anti-invisibility cloak', a device which, when layered beneath an invisibility cloak, renders any object within visible again.
The 'anti-cloak' could overcome one major limitation of the invisibility cloaks being designed and built in physics laboratories across the world: when you're invisible from the outside, the outside is invisible to you.
An anti-cloak could allow a spy, whether man or machine, hidden inside a cloak to periodically peep out.
more:
http://technology.newscientist.com/article/dn14659-anticloak-gives-vision-to-the-invisible.html?DCMP=ILC-hmts&nsref=news3_head_dn14659