Bombings

A Monaco supporters gestures prior the Champions League first leg quarterfinal soccer match between Borussia Dortmund and AS Monaco in Dortmund, Germany, Wednesday, April 12, 2017. (AP Photo/Martin Meissner)

FILE -- In this June 1, 2016 file photo, Egyptian President Abdel-Fattah el-Sissi, speaks during a press conference with Hungarian Prime Minister Viktor Orban at the presidential palace in Cairo, Egypt. El-Sissi picked three former leaders at state news organizations during the era of deposed autocrat Hosni Mubarak to lead new media watchdog agencies, part of measures to tighten his control following a pair of horrific church bombings. The move comes just days after President Abdel-Fattah el-Sissi publicly criticized media coverage of the deadly suicide bombings in the cities of Tanta and Alexandria.(AP Photo/Nariman El-Mofty, File)

FILE - In this file photo dated Tuesday, Feb. 14, 2017, Dortmund's Marc Bartra reacts during the Champions League round of 16, first leg, soccer match between Benfica and Borussia Dortmund at the Luz stadium in Lisbon. Borussia Dortmund said Tuesday April 11, 2017, defender Marc Bartra was injured in an explosion near team bus and is currently in a hospital. (AP Photo/Armando Franca, FILE)

Dortmund supporters hold posters "You'll never walk alone" outside the training ground of Borussia Dortmund in Dortmund, Germany, Wednesday, April 12, 2017, one day after an explosion at the bus of the team prior to the Champions League quarterfinal soccer match between Borussia Dortmund and AS Monaco (AP Photo/Mike Corder)

FILE --In this Aug. 17, 2016 file frame grab taken from video provided by the Syrian anti-government activist group Aleppo Media Center (AMC), 5-year-old Omran Daqneesh sits in an ambulance after being pulled out of a building hit by an airstrike in Aleppo, Syria. With its missile strike on Shayrat Airbase in central Syria, Washington signaled that it had judged President Bashar Assad responsible for the horrific chemical weapons attack in north Syria that drew international outrage last week. But it is not the first or even deadliest atrocity of the war. (Aleppo Media Center via AP, File)

Blood stains pews inside the St. George Church after a suicide bombing, in the Nile Delta town of Tanta, Egypt, Sunday, April 9, 2017. Bombs exploded at two Coptic churches in the northern Egyptian cities of Tanta and Alexandria as worshippers were celebrating Palm Sunday, killing over 40 people and wounding scores more in assaults claimed by the Islamic State group. (AP Photo/Nariman El-Mofty)

People gather outside the St. George's Church after a suicide bombing, in the Nile Delta town of Tanta, Egypt, Sunday, April 9, 2017. Bombs exploded at two Coptic churches in the northern Egyptian cities of Tanta and Alexandria as worshippers were celebrating Palm Sunday, killing over 40 people and wounding scores more in assaults claimed by the Islamic State group. (AP Photo/Nariman El-Mofty)

A man sits on a bench outside a church after a bomb attack in the Nile Delta town of Tanta, Egypt, Sunday, April 9, 2017. The attack took place on Palm Sunday, the start of the Holy Week leading up to Easter, when the church in the Nile Delta town of Tanta was packed with worshippers. (AP Photo/Nariman El-Mofty)