Two teams are expected to work round the clock to produce and lay 4, 000 tonnes of asphalt during each of the closures.

BBC: Guernsey Airport in third planned closure

It is a small room in a bustling government office, where a team of 12 women work round the clock in shifts and attend to calls.

BBC: A busy night at Delhi's helpline for women

For Buck the breakthrough represented the payoff for three years of round-the-clock work in the lab at Columbia.

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In spite of round-the-clock work, progress on boring a huge tunnel into the earth was not up to mark.

FORBES: Delhi's Subway Builder