7 things to know now: Delta Airlines down; Trump tries reset; Olympic glory for some

What to know now:

1. Delta down: Delta Airlines grounded all of its flights Monday morning due to a problem with its computer system. According to the airline, they do not know when flights will resume. "Delta has experienced a computer outage that has impacted flights scheduled for this morning," the airline said. "Flights awaiting departure are currently delayed. Flights en route are operating normally. Delta is advising travelers to check the status of their flights this morning while the issue is being addressed."

2. Trump's speech: Donald Trump will try to put a pretty bad week behind him starting Monday with an economic speech in Detroit. According to his  campaign, Trump will talk about boosting jobs and cutting business taxes while reducing regulations. The speech is set for the Detroit Economic Club.

3. Olympics continue: American swimmer Michael Phelps did something no one in history has done before – he won his 23 Olympic medal Sunday night. And to make the moment even sweeter, it was a gold one. Phelps won the medal along with his three teammates in the 400 freestyle relay. The Olympics continue Monday from Rio.

4. Water slide death: A 10-year-old boy was killed on a water slide in Kansas City, Kansas Sunday. Caleb Thomas Schwab, son of a Kansas state lawmaker, died while on a slide called "Verruckt." The Verruckt is a 168-foot-tall water slide that has 264 stairs leading to the top. The slide is the largest in the world. There has been no word on how the boy died.

5. A-Rod retiring: New York Yankees star Alex Rodriguez announced his retirement from baseball Sunday. A-Rod will play his final game Friday, and then become a special adviser and instructor with the Yankees.

And one more

Two skydivers, jumping in tandem, were killed Saturday in California when their parachute failed to open. The two were jumping near Lodi, Calif., when the accident happened. Killed was an 18-year-old who was jumping for the first time with a skydiving instructor. The instructor was a veteran of more than 700 jumps, according to authorities.

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