Watch Live: Queen Elizabeth II's state funeral at Westminster Abbey

QUEEN ELIZABETH II STATE FUNERAL(HER MAJESTY) SHARE OF THE DAY

The official mourning period for Queen Elizabeth II, the U.K.'s longest-reigning monarch, culminated Monday morning with her state funeral in London's ancient Westminster Abbey. The guest list for the service includes around 500 foreign dignitaries, including President Biden and about 100 other heads of state. The huge influx of VIPs was putting an unprecedented security operation, which was decades in the planning, to the test.

Queen Elizabeth died on September 8 at the age of 96 at Balmoral Castle, her beloved country estate in Scotland. Her eldest son, now King Charles III, has led the royal family, the nation and the world in honoring her legacy and ushering in a new era that is likely to present growing challenges for both the kingdom and its Commonwealth.

Monday's full service will be broadcast live, with CBS News coverage from 5:30 a.m. ET, anchored by Norah O'Donnell and Gayle King.

PO1 William "Chip" Nagel Lt Col Charlie Brown SSG Michael Noll Lt Col John (Jack) Christensen Cpl Vic Burk SGT Charlie Lee SGT David A. 'Cowboy' Groth ] Sgt (Join to see) SPC Michael Terrell CPL Douglas Chrysler A1C Medrick "Rick" DeVaney GySgt Jack Wallace CPL LaForest Gray SFC David Reid, M.S, PHR, SHRM-CP, DTM PV2 Larry Sellnow SPC Gary C. SPC (Join to see) SGT Steve McFarland SGT Jim Arnold MSG Darold R.