In East London, other Olympic sites are taking shape. International Olympic Committee President Jacques Rogge visited the sites and offered an opinion to Prime Minister David Cameron. "There is already, before the Games even begin, a great legacy in East London, a great legacy of the sports venues and this is a tangible legacy. To conclude, prime minister, we are a happy International Olympic Committee. Thank you very much." But not everyone is happy. On two days this week, immigration lines reached well over 90 minutes at Heathrow, London's main airport. Some travelers expressed their anger and shared photographs on the Internet. British lawmakers are warning that Olympic visitors could face long waits in immigration lines or on airplanes. The government says it will be ready. A temporary terminal at the airport has been built especially for Olympic competitors. There are also concerns about traffic on roads and crowds on public transportation during the Games.