It has been more than a week since Hurricane Maria wreaked devastation on Puerto Rico, destroying the power grid and leaving millions without immediate access to necessities.
Emergency supplies of food, water and gas have begun to arrive at ports, but trucks cannot deliver these needed supplies across the island. Many roads are wrecked or blocked off, and the island faces fuel shortages.
There has been intense criticism of the Trump administration's response to the growing humanitarian crisis, although the president has defended the government's actions.
Above: USNS Comfort departs Naval Station Norfolk on the afternoon of Sept. 29, beginning its journey to Puerto Rico.