To northern Thailand, where the search for 12 teenagers and their football coach continues. It's now more than a week since they went missing in a flooded cave. The governor of Chiang Rai says rescue divers cleared a key hurdle on Sunday in the increasingly desperate search. A team led by Thai navy SEAL divers pushed through the murk of a kilometer-long chamber to a passageway that could lead to where the missing may have taken shelter. A Chinese rescuer at the site said China will send a group of remote-controlled submersibles to assist in the rescue mission. CGTN's Martin Lowe has more on the rescue efforts.