World Leaders Meet To Put More Pressure On Gadhafi

As fighting between government and rebel forces rages on in several Libyan towns, world leaders will gather Tuesday in London to plan ways to put pressure on leader Moammar Gadhafi.

More than 40 foreign ministers and representatives from regional groups will attend the conference, including U.N. Secretary-General Ban Ki-moon, Chairman of the African Union Jean Ping and U.S. Secretary of State Hillary Clinton.

"The purpose of this conference is to broaden and deepen the coalition effort," said British Foreign Secretary William Hague. "We all want to see that cease-fire. We all want to see Gadhafi go. Those things are clear. But once we have that cease-fire, we have something to work with."

The conference comes as opposition fighters, aided by coalition airstrikes, made some gains in fighting Gadhafi's forces. It also comes a day after U.S. President Barack Obama explained America's role in the conflict and declared that "history is not on Gadhafi's side."

Organizers of the conference say the influential group will look for ways to strengthen the U.N. Security Council resolution approved on March 17 that created a no-fly zone above Libya and mandated the protection of civilians. They will also search for urgent ways to get humanitarian aid to war-torn cities like Misrata.

Rebels are holding a tenuous grasp on some of the gains they made this week, but suffered setbacks Monday on their trek west into territory loyal to Gadhafi.

As they moved into Umm el Ghindel -- near Sirte, Gadhafi's birthplace -- they found that Gadhafi's forces had armed residents in the area, they said. They beat a hasty retreat, they said.