Both Facebook and Twitter today joined the ranks of a growing number of tech companies announcing support for Apple's decision to oppose a government order that would require it to weaken the security of its iOS devices.<br />The FBI is demanding Apple create a version of iOS that would let it crack the passcode on the iPhone 5c used by San Bernardino shooter Syed Farook, something Apple has called a "dangerous precedent."<br />In a tweet shared this afternoon, Twitter CEO Jack Dorsey thanked Tim Cook for his leadership and said the company stands with Apple.<br />In the tweet, Dorsey also links to Cook's strongly worded open letter that calls the FBI's software request "too dangerous to create."<br />Facebook announced its support through a statement shared with USA Today, which says the company will "fight aggressively" against government requirements to weaken security.<br />Facebook says the FBI's demands "would create a chilling precedent."