Although I agree with all above about wall street needing a lashing... Or better firing and regulation....
I wouldn't worry about the us deficit. The us deficit is 10 % GDP... And many countries are much higher. Couple that to the fact that the us is the most powerful country in the world, there is little to worry as long as they actively manage it. Considering the current interest rates, the cost of servicing that GDP is actually Lower today than it was in the 90s when the ratio was lower. This is part of the reason the rates will stay low for a time.
I would suggest you buy low and sell high. Convert your dirhams to USD as much as you can, and invest in that currency. When the rebound happens, and it will unless you think the us will go bankrupt, then you can cash in.
However it's not a sure thing, and emirates should be protecting it's assets ie: employees, as much as it can. That is... If it was smart.