its like hitting bullet with a bullet. It hasn't happened yet. Biggest flop project in US history. Glad india wants to buy them.
Patriot 1 was somehow the failure but India is going for Patriot 3 which is offcourse much better because of given below reason.
**
"The fastest way to succeed is to double your failure rate." -- Thomas J. Watson
**India has another option of going for Arrow-2 (Israel system) defense system as India already operate "Green Pine" radars which has much better accuracy.