An Australian diver involved in a cave rescue in Laos remains hopeful for the two remaining missing miners after the discovery of a "vertical drop" that could provide another entryway "[We were] very, very excited by the fact that we found a vertical drop, that drops down more than 100m that is right in the correct area."We're hoping there's another way into this because the current entryway is regularly flooding and it's frankly terrifying." Five of the men were found alive on Wednesday, huddled in a narrow shaft around 300m from the cave mouth.Footage filmed by rescue divers showed them muddy and despondent, complaining of chest pains and hunger pangs.Rescuers had for days been pumping water from the entrance when four of the men emerged on Saturday