The 2017 Amtrak Autumn Express "Hudson River Loop" edition stopped at Newark to let more passengers on, as well as swap from power provided by the 642 to the 156 and 145 on each end of the train.
The GE Genesis series are well known for being Amtrak's locomotive. With confirmation of retirement from Amtrak themselves, their time is limited. Now is your chance to catch them before the chargers arrive!