lufthansa may sue over bush visit german airline lufthansa may sue federal agencies for damages after the arrival of us president george w bush disrupted flights.  lufthansa said that it may lose millions of euros as a result of air force one landing at frankfurt airport. flights were affected for an hour on wednesday morning  double the time that had been expected  leading to cancellations and delays. lufthansa accounts for six out of every 10 planes using frankfurt s airport.   we are doing research into the possibilities we have   michael lamberty  a lufthansa spokesman told the bbc.  we are checking if there is action to be taken and in which courts it could be taken.  mr lamberty explained that the company did not plan to pursue germany s air traffic controllers  organisation or the airport authority but wanted instead to see if it was possible to sue the german federal agencies that gave the orders. the company said that it had to cancel 77 short and medium-distance flights  affecting about 5 000 passengers. long-haul travellers were not disrupted.  central to the problem was that instead of half an hour  the arrival of president bush on the german leg of his european tour took the best part of an hour  lufthansa said. during that time  restrictions were put on planes taxiing  taking off and landing at frankfurt s rhein-main airport. the extra time taken by president bush and his entourage meant that there was a knock-on effect that led to significant delays. mr lamberty said that 92 outgoing flights and 86 income flights were delayed by an average of an hour following president bush s arrival  affecting almost 17 000 passengers. despite the problems  mr lamberty said that it was not certain that lufthansa would take legal action.