As 61-year-old Belgian interpreter Nicola Cantisani, who is blind, sat for two hours waiting in the Brussels-bound U.S. Airways jet on the tarmac at Philadephia airport in early April, he wondered why no one was telling passengers about the reasons for the take-off delay. When he requested a glass of water he was shooed away by the crew. When he tried to ask the captain exactly why there was a delay, Cantisani was asked to disembark.