Boeing acknowledged Friday that the horizontal tail section of the 787 Dreamliner had cracked slightly during a so-called "bird-strike" test, but described the incident as a routine part of developing the new jet. The Dreamliner program is under intense scrutiny as Boeing prepares to build the first all-composite airliner, so every glitch — or potential glitch — makes analysts and investors skittish. Spokeswoman Lori Gunter said the test was part of the development process and not a certification test, so the company's engineers strongly object to applying "the f-word," meaning failure. "It wasn't a test you pass or fail. It...