Public Works Minister Rona Ambrose responds to a question during Question Period in the House of Commons on Parliament Hill in Ottawa, Wednesday October 20, 2010. Edmonton's voice in the federal cabinet is defending Ottawa's decision not to fund the Alberta capital's bid to host a world's fair in 2017. Ambrose says officials only began looking at the full costs of the event about a month ago when they got the city's full proposal.THE CANADIAN PRESS/Adrian Wyld