If the network from your MBA program abroad isn't that strong in the industry that you work in or in your geography, you'll get minimal value out of it. If the network from your MBA program is not in senior (or more senior positions than you are), you'll get minimal value. This is why there is a pareto distribution between the top programs and the other tiers of programs.
There are plenty of foreign MBA programs that have robust networks in the US. Take a look at the Global MBA list. http://rankings.ft.com/exportranking/global-mba-ranking-2015...
Within the top 15 globally: Insead (worldwide), Iese (Spain), Ceibs (China), HKUST (China), HEC (France).
Although not in the top 15, IIT has a robust network in the tech industry.