The incident happened last July, but the report came out yesterday. A United Airlines plane was set to land at Charles de Gaulle Airport in Paris and an EasyJet plane was set to take off.
The controller told the United Airlines crew to land on runway 09R, but it was supposed to land on 09L. As you may guess, the EasyJet was taking OFF from 09R at the same time, but saw the incoming plane and told the tower of the imminent crash.
The planes came within 300 feet of each other as the United flight aborted their landing. Whew.