BUFFALO, New York (KABC) -- Donald Trump misspoke Monday evening, causing big gulps from viewers as he referred to 9/11 as "7-Eleven."The Republican presidential candidate was speaking about the brave men and women who were thrust into action following the terrorist attacks on Sept. 11, 2001."I was down there, and I watch our police and our firemen down on 7-Eleven, down at the World Trade Center, right after it came down and I saw the greatest people I have ever seen in action," Trump said. "I saw the bravest people I have ever seen including the construction workers, including every person down there, that's what New York values about."Trump was speaking to thousands at a rally being held at the First Niagara Center in Buffalo, New York.New York's primaries being held Tuesday are crucial for the three Republican candidates, as Trump looks to slow Ted Cruz's momentum and John Kasich for a victory to keep him in the race.