LONDON/CHICAGO (Reuters) – A British man accused of market manipulation that contributed to the May 2010 Wall Street “flash crash” said he opposed being extradited to the United States, while the operator of the market where he traded sought to rebut prosecutors’ suggestion that futures helped cause the crash. Bail for Navinder Singh Sarao, 36, was set at 5 million pounds ($7.5 million), along with other conditions. Sarao’s bail hearing was his first appearance since the U.S.