3 brand new BNSF ET44C4's lead train QCHISBD near Thorn as they climb the back side of Cajon Pass.
Following hot on the heels of a slow moving UP manifest, BNSF 3970 works through Hesperia.
BNSF 3970 leads 3971 and 3972 on a westbound QCHISBD on their first trip after delivery.