Here are the headlines from the recent Arizona Grand Prix in the USA, which took place 12-13 May.
1. Long-lasting records fall
Rio 2016 medallist Cassie Mitchell broke a world record which had stood for 28 years – the women’s 1,500m T51. Only four women’s world records now exist that were set before 1989.
2. Showdown set for London 2017
Great Britain’s Samantha Kinghorn set a new world record in the women’s 200m T53. The 21-year-old’s winning performances in the US have set up a terrific showdown at London 2017 in a class recently dominated by Chinese and Australian Para athletes.
3. Competition is getting tougher
Events are proving highly competitive – in the men’s T52 class US racer Ray Martin, a four-times gold medallist at London 2012 - was beaten over 100m, 400m and 1,500m; US thrower Rachael Morrison regained the club throw F51 world record from Paralympic champion Jo Butterfield; while in the discus F44, only 34cm separated Paralympic champion David Blair and world champion Jeremy Campbell.
4. Young stars in the making
The future looks bright for a number of talented teenagers who won in Arizona - including the USA’s 16-year-old Alexa Halko (T34), 18-year-old Jaleen Roberts (T37), 16-year-old Spencer Kimbro (T53) and 15-year-old Canadian Zachary Gingras (T38).
5. Sprinters beware! US star names race towards World Championships
US stars Jarryd Wallace (T44) and David Brown (T11) both won their 100m and 200m races in Arizona – watch out for the pair at London 2017.