Hamilton's former physio Cullen on the podium in Indycar

Angela Cullen, the former physio of Lewis Hamilton, has moved to the world of Indycar in the United States and found herself being part of a podium-winning team once again. Cullen is now working alongside New Zealander Marcus Armstrong in the NTT IndyCar Series, and at the Detroit Grand Prix last weekend, Armstrong sliced through the field, coming from 20th to finish third. But who are both Angela Cullen and Marcus Armstrong? GPblog explains.