The last mainline operational Wig Wag on the BNSF system and potentially the western US does its thing as Amtrak's Southwest Chief blasts by westbound. It has been rumored it the signal is endangered and may be gone as soon as the end of this month.
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!