Up to 100,000 Ukrainians massed in the capital Kiev on Sunday in defiance of sweeping new laws aimed at stamping out anti-government protests. The rally, the biggest this year in a cycle of pro-Europe protests convulsing the former Soviet republic for the past two months, was spurred by the legislation rushed through parliament last week and which the opposition says will lead to a police state.Significantly raising the stakes in the confrontation withPresident Viktor Yanukovich, opposition leaders announced a plan to gather people's signatures expressing no confidence in his leadership and that of parliament.Denouncing as unconstitutional last Thursday's hurried vote...