North Korea's International Olympic Committee member, Ung Chang, said he hopes the Olympics will go on as planned, but that nobody knows whether South Korea will be safe for the Olympics.
At Gates Street Elementary school in Los Angeles' Lincoln Heights neighbourhood, children enrolled in the city's Better Educated Students for Tomorrow (BEST) programme and rotated through Olympic themed sport stations.
"We have an enormous amount of work to do to be able to organize and fully win, altogether, these 2024 Games", Macron added.
Los Angeles Mayor Eric Garcetti, high-fives kids from LA84 Foundation during the Celebrate 2028 Olympics Parade at the Fairplex in Pomona, CA., Saturday, September 15, 2017.
The French capital has set a relatively modest budget of 6.6 billion euros ($7.9 billion), but London in 2012, Athens in 2004 and Sydney in 2000 all saw their budgets for hosting the Summer Olympics at least double from the time of their bids to the final bill.
The LA Games have a budget of $5.3 billion and will essentially follow the plan they had in place for 2024, including housing athletes at the UCLA campus.
The decision, taken by the IOC membership at the IOC Session in Lima today, ratifies the earlier recommendation of the IOC Executive Board and is another compelling endorsement of rugby sevens, which made a spectacular debut at Rio 2016. IOC President Thomas Bach said the votes for both cities were "unanimous".
Los Angeles had to wait until 1932 - the 10th Games - to be the host city.
"The annual world series is very attractive, the Commonwealth games and then Olympics are a massive drawcard for men and women wanting to compete".
The Olympic body, however, was eager to secure the future of its prime product after Boston, Budapest, Rome and Hamburg all pulled the plug on their 2024 bids mid-race.
After the announcement, representatives from the two host cities, the IOC and President Bach signed official contracts for the Olympic Games, respectively.
Tokyo, the host of the next summer Games in 2020, has also had to fend off allegations of corruption regarding the decision to award it the Games four years ago.