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It was overcast and humid when the green flag dropped on the Long Beach Grand Prix on Sunday, not exactly ideal conditions for an afternoon drive along the beach.

Setting off from BBC Broadcasting House in London on 17 March, Laing waved a giant green flag at the starting line, with a crowd of cheering supporters.

It's a lot of "red or green flag ticking," he says.

Some waved the yellow and green flag of Hezbollah, others carried posters with images of the group’s former leader Hassan Nasrallah, killed in an Israeli air strike two months ago.

Take it as a green flag if your partner has a crush on Rosemarie DeWitt.