PHILADELPHIA (WPVI) -- When visitors walk into the Weitzman National Museum of American Jewish History on Philadelphia's Independence Mall, one of the first things they'll see is a display with a teacup and a chair. These two very simple objects were at the center of one very frightening day. "(It was) a tragic and terrible hostage crisis," said Josh Perelman, chief curator of the Weitzman National Museum of American Jewish History The hostage situation that Perelman referred to unfolded this January when a stranger walked into Congregation Beth Israel in Colleyville, Texas. "The rabbi of that congregation offered him tea,"...