
The picture is a tribute by the white house.
Quoted from Britannica, part 2.
https://www.britannica.com/animal/Harambe
"On May 28, 2016, Harambe was just 17 years old, having celebrated his birthday the day before. That afternoon a three-year-old boy crawled through the barrier of the gorilla enclosure and fell more than 10 feet (3 meters) into the exhibit’s moat. Harambe picked up the boy and dragged him around the enclosure for 10 to 15 minutes before a Cincinnati Zoo worker shot and killed the gorilla. The boy was taken to the hospital with non-life-threatening injuries and was released that evening.
In a statement posted the day after the incident, Cincinnati Zoo director Thane Maynard stressed that the gorilla’s death had been necessary to save the boy’s life. He stated:
«Our first response was to call the gorillas out of the exhibit. The two females complied, but Harambe did not. It is important to note that with the child still in the exhibit, tranquilizing the 450-pound gorilla was not an option. Tranquilizers do not take effect for several minutes and the child was in imminent danger. On top of that, the impact from the dart could agitate the animal and cause the situation to get much worse.»"