If you're in the US military, or affiliated with it, you can get an AAFES ShopMyExchange.com account. With that account, you can authenticate with NBC to watch their complete coverage of every olympic event from start to finish here: http://www.nbcolympics
This is really useful for those cord-cutters who don't pay for a TV subscription but still want to watch excellent Olympic coverage. It's been my experience that NBC has the best quality streams and the best coverage (don't watch their TV channels, they're utter garbage, filled with melodramatic athlete bios and reality tv-like nonsense). Their streams are complete, from start to finish, no doubt the best way to experience the Olympics.
Finally, as a bonus, I created a way to block NBC ads from appearing in the online streams. You can find out how to do that here: https://www.youtube.com/watch?v=10QVeIN
Below the stream window, there should be a Sign In button. Click it and once that screen loads, there's a "Select from full list" drop-down box to choose your providor. Second from top of that list is "AAFES - The Exchange, Military BX/PX" which will take you to a special AAFES website to login and authenticate with NBC.