An Al-Qaeda suicide plot to hijack several passenger jets simultaneously — including a British Airways flight — and crash them into high-profile American targets has been uncovered by the security services. The American capital and nuclear power stations on the country’s East Coast are said to have been among the terrorists’ potential targets. The September 11-style plot explains the grounding of 10 US-bound flights across the world over the seasonal break. According to a senior intelligence source, an informant tipped off authorities the weekend before Christmas. He claimed that Islamic extremists intended to hijack flights operated by BA, Air France...