Andretti also speaks of the need to safeguard the US GP in Austin, Texas amid growing concerns about the future of the race.
Armand steps up from Formula Renault 3.5 to join Trident in GP2.
Marchionne believes that more manufacturers entering F1 is key to safeguarding the future of the series.
Grosjean unveils new design for the 2016 season ahead of his first on-track run-out with Haas.
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