'The last 15 minutes was the toughest of my life': Rosetta mission director reveals his agonising wait to hear from the probe - and says the biggest challenge is yet to come

'The last 15 minutes was the toughest of my life': Rosetta mission director reveals his agonising wait to hear from the probe - and says the biggest challenge is yet to come

EXCLUSIVE: Dr Paulo Ferri talks to MailOnline about what ESA has planned for Rosetta in the coming weeks and months, as it attempts a rendezvous with comet 67P/Churyumov-Gerasimenko