Bomb threats

This photo, provided by the New York City Police Department, Monday, Jan.4, 2021, shows the hoax explosive device at a mall in the Queens borough of New York. A police spokesman said that an initial investigation showed there was no explosive device. "An investigation is underway into the hoax," NYPD Sergeant Edward Riley said in an emailed statement. (New York City Police Dept. via AP)

Israelis prepare to fly to Dubai at the Ben Gurion airport near Tel Aviv, Israel, Thursday, Dec. 3, 2020. The Israeli government is urging its citizens to avoid travel to the Gulf states of the United Arab Emirates and Bahrain, citing threats of Iranian attacks. Thursday's travel advisory comes as Iran is threatening to attack Israeli targets following the assassination of its top nuclear scientist last Friday. (AP Photo/Sebastian Scheiner)

Israelis prepare to fly to Dubai at the Ben Gurion airport near Tel Aviv, Israel, Thursday, Dec. 3, 2020. The Israeli government is urging its citizens to avoid travel to the Gulf states of the United Arab Emirates and Bahrain, citing threats of Iranian attacks. Thursday's travel advisory comes as Iran is threatening to attack Israeli targets following the assassination of its top nuclear scientist last Friday. (AP Photo/Sebastian Scheiner)

This undated photo provided by the Sarpy County Jail shows Roberto Carlos Silva, of Omaha, who was arrested in connection to an attack at a Nebraska fast food restaurant in which two people were shot and killed and two were wounded. Silva was booked into jail early Sunday, Nov. 22, 2020 on suspicion of first-degree homicide and arson charges in the attack Saturday night at a Sonic Drive-in in the Omaha suburb of Bellevue. (Sarpy County Jail via AP)

Russian tourists, one holding a bottle of Champagne, talk to police officers securing the bridge leading to the Eiffel Tower, Wednesday, Sept. 23, 2020 in Paris. Paris police have blockaded the area around the Eiffel Tower after a phone-in bomb threat. (AP Photo/Michel Euler)

FILE - In this July 31, 2020 file photo, Black Lives Matter protesters gather at the Mark O. Hatfield United States Courthouse in Portland, Ore. At least two federal buildings in Portland have been closed and the FBI is investigating after a threat of violence was reported, the officials said Friday, Aug. 21, 2020. Investigators are trying to determine whether the threat is credible, the FBI said in a statement. The Mark O. Hatfield Federal courthouse, which was the site of weeks of violent protests last month, was closed, as was the Portland office of the U.S. Bankruptcy Court. (AP Photo/Noah Berger, File)

Taiwan's AH-64E Apache attack helicopter launches flares during the 36th Han Kung military exercises in Taichung City, central Taiwan, Thursday, July 16, 2020. (AP Photo/Chiang Ying-ying)

FILE - In this Dec. 4, 2019 file photo security stand outside the main gate at Joint Base Pearl Harbor-Hickam in Hawaii. A live mortar round was found in a vehicle late Tuesday at a gate to the sprawling Pearl Harbor military base, shutting down the base for hours and leading three people to be taken into custody, military officials said Wednesday, Jan. 15, 2020. A base spokesman said that he doesn't know what the trio planned to do or where they wanted to go. (AP Photo/Caleb Jones, File)

FILE — In this Jan. 19, 2019 file photo the shrine of Iran's revolutionary founder Ayatollah Khomeini is seen, just outside of Tehran, Iran. The ancient and rich cultural landscape of Iran has become a potential U.S. military target as Washington and Tehran stumble toward a possible open conflict. Iran, home to 24 UNESCO World Heritage sites, has in the past reportedly guarded the sprawling tomb complex of the Islamic Republic's founder, Ayatollah Ruhollah Khomeini, with surface-to-air missiles. (AP Photo/Ebrahim Noroozi, File)