Paris trains came to a halt, delaying athletes and tourists ahead of the Olympics opening ceremonies. Authorities are looking for the suspected arsonists who sabotaged the Paris Games.
The Kentucky Derby is the biggest horse race in America, and preparing for it takes millions of dollars and thousands of people. We went to Churchill Downs days before the big race to see what it takes to train the winning horse and prepare the century-old track for 400,000 fans.
Three hackers in Poland were hired to fix the software of a broken train, and they were successful, but now the train company, Newag, is threatening to sue them, according to Polish outlet Rynek Kolejowy.