HOUSTON, May 29 A piece of insulating foam shot at a mocked-up shuttle wing opened a long slit in its leading edge, which may help to explain what caused the loss of the space shuttle Columbia, investigators said today. http://www.nytimes.com/2003/05/30/national/30SHUT.html?th -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body