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
2010 Summer Youth Olympics torch relay the end of each day, the flame would be returned to the safety lantern. The safety lantern was also used to keep backup flames lit, allowing the main torch to be re-lit should it go out. At least three safety lanterns were kept lit throughout the duration of the relay. The cauldron, not to be confused with the Olympic cauldron lit during the opening ceremony, was lit at each community celebration site. These were found at the last location of activities during the relay at the 5 cities visited, as well as at the end of each day during the