Should the authorities have access to your iPhone?

In wake of the San Bernardino shooting, the FBI has obtained an iPhone 5C that belonged to one of the shooters. The iPhone has a lock on it and can only be unlocked by a 4 digit password, which to the feds knowledge is only known by one of the deceased shooters, Syed Rizwan Farook. This can only ask the question, should the FBI be allowed to access our smartphones and see it’s contents ?

Apple CEO, Tim Cook spoke out on the matter on February 26th, assuring it’s users that Apple would not make a “Master key” that would be able to unlock anyone’s Apple device. Cook posted a letter to Apple users on Apple’s website reassuring it’s users that their security is Apple’s number 1 priority.

(From Apple) “Finally, I want to be absolutely clear that we have never worked with any government agency from any country to create a backdoor in any of our products or services. We have also never allowed access to our servers. And we never will.”

All this can only bring up the the question, that if an iPhone could potentially have any information regarding a future terrorist attack should the Feds be allowed to access it ? And if a “master key” is created could it potentially put national security and the public’s privacy  at risk ?