A peace summit for Ukraine in Switzerland this weekend will be attended by at least 90 countries and organizations —except Russia. World leaders explore ways of ending the deadliest conflict in Europe since World War Two. G-7 world leaders boost support for Ukraine while aiming to raise the cost to Russia’s war efforts. U.S. and NATO leaders were at odds over the extent to which Ukrainians can use Western-provided weapons to hit military targets inside Russian territory. The U.N. nuclear agency or IAEA says Iran is expanding its nuclear capabilities