US President George W. Bush rejected Lebanon's calls for a cease-fire in escalating Mideast violence on Friday, saying only that Israel should try to limit civilian casualties as it steps up attacks on its neighbor. "The president is not going to make military decisions for Israel," White House spokesman Tony Snow said. Lebanon's prime minister asked Bush during a phone call Friday to pressure Israel for a cease-fire. But Bush, speaking to Prime Minister Fuad Saniora while flying from Germany to Russia, said Israelis have a right to protect themselves. "We think it's important that, in doing that, they try to limit as much as possible the so-called collateral damage, not only on civilians but also on human lives," Snow said.