U.S., Mexico vow to tackle cross-border drug trafficking

U.S. Secretary of Homeland Security Kirstjen Nielsen speaks during a press conference in Washington D.C., the United States, on Dec. 14, 2017. The U.S. and Mexican high-level officials met here on Thursday to discuss strategies to clamp down transnational criminal organizations (TCO) and illegal drug flow with joint efforts. (Xinhua/Ting Shen)