The director of TGV Atlantique, a branch of the French rail operator's high-speed train network, says acts of sabotage on rail infrastructure were "very disappointing" for his team. "We've been preparing for this for months (...) and today it's a huge disappointment for the teams because we're not up to the task," said Franck Dubourdieu, as traffic partially resumed just a few hours before the opening ceremony of the Olympic Games. IMAGES AND SOUNDBITES