06 DECEMBER 2018 - SAMUT PRAKAN, THAILAND: Passengers ride the new east extension of the BTS Skytrain on the opening day of the extension. The 12.6 kilometer (7.8 miles) east extension of the Sukhumvit Line of the Bangkok BTS Skytrain goes into Samut Prakan, a town east of Bangkok. The system is now 51 kilometers long (32 miles), including the 12.6 kilometer extension that opened December 06. About 900,000 people per day use the BTS. PHOTO BY JACK KURTZ