The same restrictions and recommendations are posted on the United Airlines website; however, your international ticket will not be canceled until 45 minutes before your flight. If you are changing airlines mid-trip, make sure to call the airline ahead of time to make special arrangements. If you arrive at your layover and have not checked in for your international flight, you may find that your ticket has been canceled.
List of people pardoned or granted clemency by the President of the United States. Ford, Gerald (September 8, 1974). President Gerald R. Ford's Proclamation 4311, Granting a Pardon to Richard Nixon. Gerald R. Ford Presidential Library & Museum.
The President...shall have Power to grant Reprieves and Pardons for Offences against the United States, except in Cases of Impeachment. The power to pardon is one of the least limited powers granted to the President in the Constitution. The only limits mentioned in the Constitution are that pardons are limited to offenses against the United States (i.e., not civil or state cases), and that they cannot affect an impeachment process.