Border patrols

Bulgarian Foreign Minister Ekaterina Zaharieva, second right, talks to Germany's Foreign Minister Heiko Maas, left, Italy's Foreign Minister Enzo Moavero, second left, and Belgium's Foreign Minister Didier Reynders prior a meeting of EU Foreign Affairs ministers at the European Council headquarters in Brussels, Monday, Dec. 10, 2018. (AP Photo/Francisco Seco)

Swedish young activist, 15-year-old Greta Thunberg, right, speaks to climate activists during the March for Climate in a protest against global warming in Katowice, Poland, Saturday, Dec. 8, 2018, as the COP24 UN Climate Change Conference takes place in the city. (AP Photo/Alik Keplicz)

FILE - In this Dec. 4, 2017, file photo, a portrait of 16-year-old Mexican youth Jose Antonio Elena Rodriguez, who was shot and killed in Nogales, Sonora, Mexico, is displayed on the Nogales street where he was killed that runs parallel with the U.S. border. Federal prosecutors on Thursday, Dec. 6, 2018, said they would not pursue another trial against Border Patrol agent Lonnie Swartz, who fatally shot the Mexican teenager but who was twice acquitted. (AP Photo/Anita Snow, File)

A woman from El Salvador waits to see whether the majority of migrants decide to move, as Central Americans debate individually whether to accept the city's plan to move them to a new shelter from the Benito Juarez sports complex, in Tijuana, Mexico, Friday, Nov. 30, 2018. Authorities in the Mexican city of Tijuana have begun moving some of more than 6,000 Central American migrants from an overcrowded shelter on the border to an events hall further away.(AP Photo/Rebecca Blackwell)

A U.S. Border Patrol detains Honduran migrants after they walked onto U.S territory from Tijuana, Mexico, Friday, Nov. 30, 2018. Thousands of migrants who traveled via a caravan members want to seek asylum in the U.S. but may have to wait months because the U.S. government only processes about 100 of those cases a day at the San Ysidro border crossing in San Diego. (AP Photo/Felix Marquez)

Ukrainian President Petro Poroshenko, left, leads the National Security and Defence Council meeting in Kiev, Ukraine, Friday, Nov. 30, 2018. Ukraine's president says that the country has barred Russian men between 16 and 60 from traveling to the country. The move comes as the long-simmering conflict between the two nations escalated in the Black Sea on Sunday. President Petro Poroshenko has tweeted that the restrictions on Russian travelers have been taken in order to prevent the Russians from forming "private armies" fighting on Ukrainian soil. (Mykhailo Markiv, Presidential Press Service via AP, Pool)

Migrants run from tear gas launched by U.S. agents, amid photojournalists covering the Mexico-U.S. border, after a group of migrants got past Mexican police at the Chaparral crossing in Tijuana, Mexico, Sunday, Nov. 25, 2018. The mayor of Tijuana has declared a humanitarian crisis in his border city and says that he has asked the United Nations for aid to deal with the approximately 5,000 Central American migrants who have arrived in the city. (AP Photo/Rodrigo Abd)

Ukrainian President Petro Poroshenko, second from right, speak with soldiers during a military training at a military base in Chernihiv region, Ukraine, Wednesday, Nov, 28, 2018. Russia and Ukraine traded blame after Russian border guards on Sunday opened fire on three Ukrainian navy vessels and eventually seized them and their crews. The incident put the two countries on war footing and raised international concern. (Mykola Lazarenko, Presidential Press Service via AP)

Migrants from Central America yell through a border wall at a U.S. Border Patrol agent after he pulled down a banner Sunday, Nov. 25, 2018, in San Diego. Migrants approaching the U.S. border from Mexico were enveloped with tear gas Sunday after a few tried to breach the fence separating the two countries. (AP Photo/Gregory Bull)