BOSTON -- A black professor at MIT has threatened to go on a hunger strike and "die defiantly" outside the provost's office if the university does not grant him tenure, which he said was denied because of racism. For two years, stem cell scientist James L. Sherley has asked senior administrators at the Massachusetts Institute of Technology to overturn the decision by his department head not to put him forward for tenure. On Monday, he was told by provost L. Rafael Reif that the decision would stand. "I will either see the provost resign and my hard-earned tenure granted at...