“WE’VE been waiting for this day for 30 years,” said Nicolas Sarkozy, France’s president, on the news this week that India had gone into exclusive negotiations with Dassault Aviation, a French firm, to buy 126 of its Rafale warplanes for $15 billion-20 billion. France has not sold a single Rafale overseas, and until this week the plane’s future looked iffy. Shares in Dassault Aviation soared by 18.5%.The loser, ironically, was the Rafale’s cousin, the Eurofighter Typhoon, built by a consortium led by EADS, Europe’s defence and aerospace champion, which is jointly controlled by Germany and France. EADS itself owns a 46% stake in Dassault, a legacy of earlier French government meddling, so its own shares inched up on the news.Dassault won its exclusive-bidder status by offering the lower price. Both European jets had satisfied the technical requirements of the Indian Air Force, which wants zippier planes to guard against China’s Chengdu J-10 combat aircraft and Pakistan’s ageing American F-16s. In tests over the Himalayas and the Rajasthan desert, India had eliminated the F-16 and F/A-18, the Russian MiG-35 and Swedish JAS 39 Gripen from the process during 2009-10.The capabilities of both the Rafale and the Eurofighter were on display during the Libyan war. The Typhoon is the superior air-to-air interceptor. The Rafale switches more easily into a ground-attack mode.After...