A view of the opening of the construction sites for the demolition of the collapsed Morandi highway bridge in Genoa, northern Italy, Saturday, Dec. 15, 2018. Genoa's mayor is promising his city will have a new bridge by Christmas 2019 to replace the one that collapsed, killing 43 people. (Luca Zennaro/ANSa via AP)

FILE- This Jan. 20, 2012, file photo, near Cloverdale in New Mexico's Bootheel region shows a gated part of the Diamond A Ranch and is 77 miles south of Lordsburg, N.M., the nearest U.S. Border Patrol station. A 7-year-old Guatemalan girl, picked up with her father and dozens of other migrants along the remote stretch of the U.S.-Mexico border, has died, federal officials said Friday, Dec. 14, 2018. (AP Photo/Russell Contreras, File)

File-This May 24, 2018, file photo shows a Spirit Airlines passenger jet plane, an Airbus 319 model, approaching Logan Airport in Boston. Spirit Airlines tops the latest ratings for on-time flights, a stunning turnaround for a discount carrier that consistently ranked as the tardiest airline in America three years ago. The Transportation Department said Friday, Dec. 14, 2018, that 89 percent of Spirit's flights in October arrived on time, putting Spirit just ahead of frequent winner Hawaiian Airlines and Delta. (AP Photo/Charles Krupa, File)

People wearing yellow vests demonstrate in Peyrorade, southwestern France, Friday, Dec.14, 2018. French President Emmanuel Macron is calling for "calm" and "order" ahead of promised new protests by the broad yellow-vest movement after rioting in recent weeks. (AP Photo/Bob Edme)

Protesters on canoes display placard as construction workers dumped a truckload of sediment on the ground and bulldozed it into the sea at Henoko on Okinawa’s east coast to build a runway for a Marine Corps base, Friday, Dec. 14, 2018. Japan's central government started main reclamation work Friday at a disputed U.S. military base relocation site on the southern island of Okinawa despite fierce local opposition. (Koji Harada/Kyodo News via AP)

Virgin Galactic reaches space for the first time during its 4th powered flight from Mojave, Calif. The aircraft called VSS Unity reached an altitude of 271,268 feet reaching the lower altitudes of space. (AP Photo/Matt Hartman)

east leg of the pipeline near St. Ignace as Enbridge prepares to test the east and west sides of the Line 5 pipeline under the Straits of Mackinac in Mackinaw City, Mich. Gov. Rick Snyder has signed legislation Wednesday, Dec. 12, 2018, establishing a panel to oversee a hotly disputed tunnel that will house an oil pipeline beneath the waterway linking Lake Huron and Lake Michigan. Snyder acted Wednesday, a day after the Republican-dominated Michigan Legislature gave the bill final approval. (Dale G Young/Detroit News via AP, File)

Holiday decorations adorn the letters on the toll booth structure on the Holland Tunnel approach, Thursday, Dec. 13, 2018, in Jersey City. Motorists are complaining that two circular wreaths and another in the shape of a Christmas tree, symmetrically aligned above the tunnel's lanes, don't look right. An online petition suggests placing the tree over the letter "A" instead of the "N". (AP Photo/Julio Cortez)