Sentinelese did not let most of the post-Pandit contact teams get near them. The teams usually waited until the armed Sentinelese retreated, then left gifts on the beach or set them adrift toward shore. The government was also concerned about the possibility of harm to the Sentinelese by an influx of outsiders—a result of them projecting a relatively friendly image. Photos of the 1991 expedition were removed from public display and use of them was restricted by the government. The next expedition was in April 2003, when a canoe built by the Onges was given to the visitors. 2004 tsunami Further expeditions (some aerial) in 2004 and 2005 evaluated the effects of the 2004 Indian Ocean tsunami, which caused massive tectonic changes to the island: it was enlarged by a merger with nearby small islands, and the sea floor was raised by about , exposing the surrounding coral reefs to air and destroying the shallow lagoons, which were the Sentinelese's fishing grounds. The expeditions counted a total of 32 Sentinelese scattered over three places but did not find any bodies. The Sentinelese responded to these aerial expeditions with hostile gestures, which led many to conclude that the community was mostly unaffected and had survived the calamity. Pandya argues that Sentinelese hostility is a sign of the physical as well as the cultural resilience of the community. The Sentinelese generally received the post-tsunami expeditions in a friendly manner. They approached the visiting parties, which carried no arms or shields as they had in earlier expeditions, unarmed. Killing of illegal fishermen adrift On 27 January 2006, Indian fishermen Sunder Raj and Pandit Tiwari, who had been attempting to illegally harvest crabs off North Sentinel Island, drifted towards the island after their boat's makeshift anchor failed during the night. They did not respond to warning calls from passing fishermen, and their boat drifted into the shallows near the island, where a group of Sentinelese tribals attacked it and killed the fishermen with axes. According to one report, the bodies were later put on bamboo stakes facing out to sea like scarecrows. Three days later, an Indian Coast Guard helicopter, dispatched for the purpose, found the buried bodies. When the helicopter tried to retrieve them, the Sentinelese attacked it with spears and arrows, and the mission was soon abandoned. There were contrasting views in the local community as to whether the Sentinelese ought to