Can a Bank call the loan?

[Mohamed Frihi]

A question came to my mind.

If I get 30yr fixed mortagage for an investment property (rental), and in this very turbulent economy, say for example the bank is going through tough times, is it possible (in theory at least) that the bank call my loan for no reason??

And if so what is the standard procedure they go through? They ask me to pay every last penny or they foreclose the property??