Lewis Hamilton was once again fastest at the end of the session free practice session at Austin, Texas. Hamilton went out for a single lap close to the end of a session that was again heavily influenced by pouring rain. The track remained empty for the bigger first half of the 90-minute session, and it wasn't until 47 minutes into the session that Brendon Hartley stepped into his Toro Rosso and went out of the garage. He continued for several laps before being joined by the Williams and Sauber drivers. Stoffel Vandoorne joined later for a few laps as well, but it was Raikkonen who first topped Hartley. At the same time, Mercedes was so much at ease that they kicked off a Q&A session on...
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