The U.S. Trade Representative overturned an injunction against Apple, which the Justice Department says leaves them with no other action to take in the matter. While the Antitrust Division has closed the investigation, it will continue to "monitor future developments".
The U.S. Trade Representative (USTR) reviewed the exclusion order issued by the ITC against Apple at Samsung’s request and overturned it, determining that it was not consistent with the public interest. As a result of the USTR’s action, the Antitrust Division has determined that no further action is required at this time. The Antitrust Division is therefore closing its investigation into Samsung’s conduct, but will continue to monitor further developments in this area."-Justice Department
source: JusticeDepartment via MacRumors