"We were simply dumbfounded by the calamity and devastation that took place on the island.
"As Defence Minister, I had considered it my bounden-duty to come to the distressed people of this island and stand by them only to convey the message that in this hour of distress we are with you", he said.
He said residents of Andaman and Islands had faced the challenges with courage and fortitude and showed great resilience.
The President had earlier in the day laid a wreath at the Tsunami memorial here.
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"You have accepted modernity but at the same time you have synthesised it with your own glorious culture, heritage and that should be the approach.
"You have not forgotten about your ancestors and the skills, the love for dance music, acrobatics which they had passed on to generations," Mukherjee said.