In 2013, NS bought a lot of SD40-2's from HLCX. These were ex UP, ex BN, ex CP, and ex BNSF. But many of them were sold, scrapped, or rebuilt into SD40-3's. There are still a few ex HLCX SD40-2's on the NS fleet. But most of them are gone. One of them is NS 3517 which was in the 2006 Kismet train collision. Why did NS get rid of these so fast? The SD40-2 is my favorite locomotive.