Here's what happened to the migrant caravan that arrived in Tijuana last year

Most have already seen a U.S. immigration officer.RELATED:Missing caravan organizer deported to HondurasThe remaining migrants chose to stay in Mexico, return home, or travel to other areas of the border, where they either attempted to enter the U.S. illegally or asked for asylum at other ports of entry, according to initial estimates from the Mexican government. In January, as remaining members of the caravan waited to claim asylum, Border Patrol agents in the sector "averaged around 160 apprehensions daily," CBP added.Meanwhile, a large group of Central American migrants traveling in a new caravan is making its way toward the U.S.On Tuesday, President Donald Trump vowed to build a "human wall" to stop "the tremendous numbers of people" coming through Mexico."Tremendous numbers of people are coming up through Mexico in the hopes of flooding our Southern Border. Being Built!The caravan left San Pedro Sula, a city in Honduras, on Jan. 15, with several hundred people.On Jan. 29, U.S. Defense Under Secretary for Policy John Rood tolda House Congressional hearing that the government was tracking three caravans, one with more than 12,000 people.“There are three that we are tracking, the Department of Homeland Security is tracking, en route, one of which is over 12,000 people, in the latest estimate,” he said.The hearing focused on troop deployments to the southern border.Whether the latest caravan had, in fact, grown to 12,000 remained unclear.On Thursday, Jan. 31, several media outlets in Mexico reported that about 2,374 migrants left a sports stadium in Mexico City that morning headed for the U.S. border.Mexico began fast-tracking humanitarian visas for migrants traveling with the latest caravan but abruptly canceled the program on Jan. 29, after 12,600 migrants applied and 4,000 had already received humanitarian visas, The Wall Street Journal reported.Migrants from Central America hoping to seek asylum in the U.S. increasingly travel in groups, or caravans, because they believe it is safer than traveling on their own. That's because Tijuana is considered safer than other Mexican border cities, it has a large network of shelters and humanitarian organizations that provide housing and legal assistance to migrants, and it borders California, a so-called sanctuary state that is considered more welcoming to undocumented immigrants and asylum seekers.But migrants in the latest caravans told media outlets they are headed to cities other than Tijuana, possibly to avoid waits lasting weeks or months to ask for asylum in the U.S.In January, the Trump administration launched a new policy—dubbed Remain in Mexico—that forces migrants seeking asylum in the U.S. to wait in Mexico while their cases are pending.The policy is aimed at discouraging migrants from making the trip to the southern border to ask for asylum, many of whom the Trump administration believes are making fraudulent claims to exploit the U.S. immigration system.The Trump administration implemented the policy at the San Ysidro border crossing near Tijuana on Jan. 25, when a single asylum seeker from Honduras was sent back to Mexico to await his hearing.