The owner of Viking did not own 50% of XL, I'm pretty sure of that, the CEO of XL, Wyatt, has set up another company, Black Pearl Investments who have invested money into Viking, but he is most certainly not an owner, CEO or anything like that. Viking were a Swedish company going long before XL went bust.
Am also thinking Leisurelad is right about the situation mentioned, as as far as I was aware too, Viking do not fly to Monastir, check their website.