<span>The assassination of Archduke Franz Ferdinand</span> lead to a direct conflict between the two powers (Austria and Russia) and further lead to the war. Hope that helps.
It was a trigger that was competing two powers in Europe. Russia and Qustria-Hungary.Franz was killed by a separatist and the Austrians wanted to see the separatist punished for what he done, while on the other hand. Russia supported him.
When both members of congress and the house meet in the senate chamber, usually to hear from the guest speaker. You see an example of this when the president delivers the State of the Union address.
