The Democratic National Convention is officially underway on Monday in Chicago, Illinois.The event will culminate inside the United Center on Thursday, with the Democratic Party celebrating the nomination of Vice President Kamala Harris as their candidate in the 2024 presidential election with a celebratory roll call.On Sunday, crews ran through a final technical rehearsal of lights and sounds on the floor of the convention inside of the United Center.Watch the video above for an inside look at the DNC.The roll call vote, typically when each state comes forward and announces how many delegates they are delivering to a presidential candidate based largely on the results of the state's primary, will be celebratory because Harris is already the official Democratic nominee.Nearly two weeks ago, an online roll call made Harris an official candidate in the 2024 presidential election. The vote made her the first nominee to be named before a party’s convention.It’s far from the only unprecedented event to occur this campaign season. Biden’s stunning decision to drop out of the race almost exactly one month ago rapidly changed the shape of the DNC in 2024. Excitement for Harris was palpable among the small number of early arrivals who took part in a technical rehearsal of the ceremonial roll call.On Monday, thousands of delegates will pour into the United Center to celebrate the nomination and watch multiple days of high-profile speakers. Hundreds of balloons are already above the convention floor, all set to fall after the roll call.There will also be party events taking place at McCormick Place, the city’s largest convention center.Much like the Republican National Convention, security will be a major factor. Thousands of protestors are in Chicago for large-scale demonstrations surrounding the war in Gaza, as well as issues like abortion and economic injustice.Those demonstrations are mostly happening at pre-organized spots outside of gates and barricades that have blocked roads and walkway paths to filter traffic through and around checkpoints.Despite being held a good distance away from the convention, protestors hope their voices are heard as delegates draft and discuss their plans should Harris win the election in November and become the first Black female president and first Indian American president.