So that FBI can use some brute-forcing techniques to retrieve the password of iPhone which are under investigation.
Thus a debate has arisen on whether Apple should do what FBI asks or stick to its privacy policy.
Understandably, the debate surrounding issue is contentious.
On the other hand, the iPhone in question may very well contain information about a larger terrorist cell.
Apple response to this question was as follows:
The digital world is very different from the physical world.
In the physical world you’re able to destroy something and its gone.
However, the case is in the court and Apple has decided to fight for user privacy .
Googles CEO Sundar Pichai has also joined this debate recently taking a favour of Apple.
source: www.techworm.net