India Tightens Security at Major Airports

Worried about a "9/11-style attack," India increased security at its airports today as the United States began an effort to convince Pakistan it needs to crack down on terrorist groups like the one believed responsible for the deaths of 171 people in Mumbai last week.
A new threat warns of attacks planned on three major airports.

Indian intelligence and security officials tell ABC News they are worried terrorists may have infiltrated India either to attack airports or hijack planes to try and execute an act akin to Sept. 11.