It is rare that Bing has more recent imagery than Google, but in this case they show a lot of new construction. Inside the Egyptian compound are new vehicles, trenches and a grid of buildings smaller than a Landcruiser. Outside the wire to the northeast there are what look to be rondavels, possibly for construction staff housing. On the Sudanese side there are now also a few vehicles on the roadside. Note that these images are over a year old (based on “capture-date”) but they only came online within the last few weeks.