MIAMI, April 29 : Formula One gets back on track in Miami this weekend, after a forced April break, with rule tweaks and car upgrades adding a fresh twist while teenage championship leader Kimi Antonelli chases his third win in a row for Mercedes. The first U.S. race of the sport's new era is the fourth round of the 2026 season after grands prix in Bahrain and Saudi Arabia had to be shelved due to the Iran war and fallout in the Gulf region. In the absence of cars on track, the development race