22 Of The Most Powerful Photos Of This Week

Complete with mist from fog machines, the South Portico of the White House is decorated for Halloween ahead of the arrival of President Donald Trump and first lady Melania Trump for a Halloween trick-or-treat event at the White House on Oct. 28.

A caravan of thousands of migrants from Central America, en route to the United States, makes its way to San Pedro Tapanatepec from Arriaga, Mexico, on Oct. 27.

A wall of police in riot gear blocks the highway to stop a caravan of thousands of Central American migrants from advancing, outside Arriaga, Mexico, on Oct. 27.

Men part of a caravan of thousands of migrants from Central America en route to the US, throw stones at a Mexican Police helicopter after they pull down the border gate with the intention to carry on their journey, in Tecun Uman, Guatemala, on Oct. 28.

A migrant woman, part of a caravan of thousands traveling from Central America en route to the United States, breastfeeds her baby while resting in a makeshift camp in Juchitan, Mexico, on Oct. 30.

Flowers surround Stars of David, part of a makeshift memorial outside the Tree of Life Synagogue to the 11 people killed during worship services, on Oct. 27 in Pittsburgh.

A participant in a march in memory of the victims of the Tree of Life Synagogue shooting, holds a sign opposing President Donald Trump, in Pittsburgh on Oct. 30.

A banner encouraging tribal members to vote in the 2018 midterm elections on the Standing Rock Reservation near Fort Yates, North Dakota, on Oct. 26.

Participants gather prior to President Donald Trump's arrival to address the "2018 Young Black Leadership Summit," in the East Room of the White House on Oct. 26.

Senate candidate Beto O'Rourke holds a Texas flag as he poses for a group photo with supporters during a campaign rally in Mueller Lake Park on Oct. 31, in Austin, Texas.

Workers protest against Google's handling of sexual misconduct allegations at the company's Mountain View, California, headquarters on Nov. 1.

A supporter of far-right lawmaker and presidential candidate for the Social Liberal Party, Jair Bolsonaro, wears a mask of President Donald Trump as he celebrates after Bolsonaro won Brazil's presidential election, in Sao Paulo, Brazil, on Oct. 28.

Shoes found during the search for victims from the ill-fated Lion Air flight JT 610 are collected at the Jakarta International Container Terminal in Jakarta, on Oct. 31.

In this photo taken on Oct. 27, a child is carried by a member of Spain's Maritime Rescue Service as they arrive at the port of San Roque, Spain, after being rescued by Spain's Maritime Rescue Service in the Strait of Gibraltar.

Miao Rong Lu, 68, swims in the sea at the Sai Wan Swimming Shed in Hong Kong on Oct. 5.

A woman walks in a flooded street of Venice, Italy, on Oct. 29, as 70 percent of the lagoon city has been flooded by waters rising more than 58 1/2 inches above sea level.

Meghan, Duchess of Sussex, exchanges a hongi during a welcome ceremony at Government House in Wellington, New Zealand, on Oct. 28.

Performers in costume attend a Day of the Dead parade in Juchitan, Mexico, on Oct. 31.

International Space Station crew members Serena Aunon-Chancellor of the US, Alexander Gerst of Germany, and Sergey Prokopyev of Russia mark Halloween in this photo released on Nov. 1.

A participant takes part in a "Zombie Walk" parade in Kiev, Ukraine, on Oct. 27.

Tom Pearcy rows the record-breaking pumpkin boat down the River Ouse in York, Yorkshire, UK, on Oct. 29.

Israel and Estelle, both from Honduras, part of a caravan of thousands of migrants from Central America en route to the United States, kiss while bathing in Rio Novillero in San Pedro Tapanatepec, Mexico, on Oct. 27.