2000 Summer Olympics torch relay in 1936. The Flame is initiated by using a parabolic mirror that concentrates the sun's rays. However, due to some cloud cover on the day of the ceremony, there was insufficient sunlight to create the required level of heat. A backup, lit on the previous day during rehearsals, was used instead. The remainder of the ceremony could then take place. The relay always begins in Greece and travels from Olympia to Athens and the Panathenaic Stadium. The Hellenic Olympic Committee arranged for the torch to be taken to several Greek islands, a first in the history of Olympic relays. The
Olympic Games ceremony the three oaths are merged into one as the Unified Oath where one athlete, judge, and coach recite one line of the oath respectively before the athlete finishes it. Finally, the Torch is brought into the stadium, passed from athlete to athlete during the torch relay, until it reaches the last carrier; often a well-known athlete from the host nation, who lights the fire in the stadium's cauldron. Under IOC rules, the lighting of the Olympic cauldron must be witnessed by those attending the opening ceremony, implying that it must be lit at the location where the ceremony is taking