Right, lets deal in facts and not fiction.... There is already too much rubbish spouted about this sort of thing on Airliners.net and on here, so I will clarify some points for you
1)KLM do operate B767-300s into Heathrow. If you haven't seen one then you should spend more time at the airport. If you have seen lots of them then you should spend less time at the airport and more time in the pub.
2)Today one of them had a problem with wheel bearings on the main gear which seized whilst taxiing down 09R attempting to return to a stand. The Airport Fire Service attend these sort of things because when bearings and things seize they start to get very very hot indeed..... think metal on metal under duress
3)The Cathay A340 had a rejected take-off. Rejecting at a reasonable speed requires a healthy application of brakes.... these get hot.... the fire service attend (See above)
4)Runway 09L was used in a similar manner to Gatwick/Stansted, etc... i.e. one lands, one takes off
5)There was no collision between anything at all.... None, nothing, nichts!!
6)There was no landing aircraft with undercarriage problems
7)There was a period of having no aircraft arriving or departing from heathrow airport.... as a consequence of the two above mentioned problems
8)There was no KLM landing with wing problems (as mentioned elsewhere)
9)Nobody died, or was injured
10)The above events resulted in delays, and the creation of a sperm whale and a bowl of petunias (Hitchhikers Guide To The Galaxy, its on at the cinemas)
11)There is no big deal about any of this. S**t happens
Any questions?