Do I need a visa to layover in Rome?

I am travelling from India to USA. Ive layovers in Abu Dhabi and Rome. Do I require a visa to layover at Rome?? or:I am travelling from India to USA.

I am travelling from India to USA. I've layovers in Abu Dhabi and Rome. Do I require a visa to layover at Rome??

or:I am travelling from India to USA. I've layovers in Abu Dhabi and Rome. Do I require a visa to layover at Rome??

or:Only if you try to leave the terminal.

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