 Complete the following phrase:  The BBC began simulcasting the channel overnight on terrestrial channel BBC One with the launch of the channel, ending the tradition of a closedown but at the same time effectively making the service available to many more viewers. In the early 2000s, BBC Two also started simulcasting the channel, although the weekend morning show Weekend 24 had been simulcast on the channel in the early days. During major breaking news events, the BBC News Channel has been broadcast on BBC One; examples of special broadcasts include the 11 September 2001 attacks, 7 July 2005 London bombings, 