LONDON As Israeli forces resume and expand their assault on Gaza by land, air, and sea, Doctors Without Borders (MSF) on Wednesday denounced the mounting toll on Palestinian civilians and aid workers, saying the enclave has become a "mass grave" of Palestinians. "Palestinian lives are once again being systematically destroyed," the MSF said in a statement, adding that a series of deadly attacks over the past three weeks by Israeli forces "have shown a blatant disregard for the safety of