NEW DELHI — Indian airports were on high alert Friday after intelligence services received information that Al Qaeda-linked militants were plotting to hijack a plane. Such an attack would be the first major terror strike against India since 10 militants rampaged through the city of Mumbai for three days in November 2008, killing 166 people. Aviation spokeswoman Moushumi Chakravarty said that the airports were placed on alert Thursday after the government received warnings from the intelligence agencies.(continued)