Walsh won in 54.33 seconds at the Fort Lauderdale Open in Florida, where she set her previous world record of 54.60s.
President Ruto gifts him $62,000 and a car after the runner’s aircraft receives a water cannon salute in Nairobi.
The first man to run a marathon in under two hours in a competitive race received a hero's welcome from supporters and family when he arrived home.
Emily and Simion Sawe share their pride at the runner's historic sub-two-hour marathon win.
Sebastian Sawe breaks Kelvin Kiptum’s previous world record of 2:00:35; Ethiopia's Assefa retains her women's crown.
The humans were left far behind as smartphone maker Honor's humanoid robot shattered the men's world record in China.
Gout Gout breaks the under-20 world record for 200m, while also making him faster than Usain Bolt at the same age.