I just read an article in the New York Times that said the 12 boys and their 25-yr old coach went to the cave after soccer practice
on June 23 and were caught inside by rising floodwaters. While the cave is a popular spot to visit, a sign outside warns that in the rainy months starting in July, it is unsafe to go inside. When the boys were found, they were found about 3 miles from the cave entrance.
Now there have been so many rescue workers in the cave trying to get them out that they are running out of oxygen.
You'd think that with all the engineers and geologists in the world that somebody somewhere would have come up with a solution by now to get them out.