Israeli president Reuven Rivlin visits a wounded man from the bus bombing yesterday, at Shaare Zedek Medical Center in Jerusalem, April 19, 2016. Photo by Amos Ben Gershom/GPO ***HANDOUT EDITORIAL USE ONLY/NO SALES***

Israeli president Reuven Rivlin visits a wounded man from the bus bombing yesterday, at Shaare Zedek Medical Center in Jerusalem, April 19, 2016. Photo by Amos Ben Gershom/GPO ***HANDOUT EDITORIAL USE ONLY/NO SALES***

Israeli Prime Minister Benjamin Netanyahu (R) and Singapore Prime Minister Lee Hsien Loong walk shake hands during a meeting at the Prime Minister office in Jerusalem on April 19, 2016. Photo by Haim Zach / GPO ***HANDOUT EDITORIAL USE ONLY/NO SALES***

Israeli Prime Minister Benjamin Netanyahu and Singapore Prime Minister Lee Hsien Loong walk during the welcome ceremony at the Prime Minister office in Jerusalem on April 19, 2016. Photo by Haim Zach / GPO ***HANDOUT EDITORIAL USE ONLY/NO SALES***

Israeli Prime Minister Benjamin Netanyahu and Singapore Prime Minister Lee Hsien Loong walk during the welcome ceremony at the Prime Minister office in Jerusalem on April 19, 2016. Photo by Haim Zach / GPO ***HANDOUT EDITORIAL USE ONLY/NO SALES***

Israeli Prime Minister Benjamin Netanyahu (R) and Singapore Prime Minister Lee Hsien Loong (2R) seen during the welcome ceremony at the Prime Minister office in Jerusalem on April 19, 2016. Photo by Haim Zach / GPO ***HANDOUT EDITORIAL USE ONLY/NO SALES***

Israeli Prime Minister Benjamin Netanyahu (R) and Singapore Prime Minister Lee Hsien Loong seen during the welcome ceremony at the Prime Minister office in Jerusalem on April 19, 2016. Photo by Haim Zach / GPO ***HANDOUT EDITORIAL USE ONLY/NO SALES***

Rachel Dadon arrives to speak with the press at Hadassa Ein Karem hospital where she and her daughter are hospitalized after being injured from the bus bombing that took place in Jerusalem, on April 19, 2016. Rachel was moderately injured and her daughter is in critical condition. Bus route 12 exploded by a bomb in a suspected terror attack, leaving at least 15 people injured. Police are investigating if the incident was a terror attack. Photo by Hadas Parush/Flash90

Rachel Dadon speaks with the press at Hadassa Ein Karem hospital where she and her daughter are hospitalized after being injured from the bus bombing that took place in Jerusalem, on April 19, 2016. Rachel was moderately injured and her daughter is in critical condition. Bus route 12 exploded by a bomb in a suspected terror attack, leaving at least 15 people injured. Police are investigating if the incident was a terror attack. Photo by Hadas Parush/Flash90

Rachel Dadon speaks with the press at Hadassa Ein Karem hospital where she and her daughter are hospitalized after being injured from the bus bombing that took place in Jerusalem, on April 19, 2016. Rachel was moderately injured and her daughter is in critical condition. Bus route 12 exploded by a bomb in a suspected terror attack, leaving at least 15 people injured. Police are investigating if the incident was a terror attack. Photo by Hadas Parush/Flash90

Rachel Dadon speaks with the press at Hadassa Ein Karem hospital where she and her daughter are hospitalized after being injured from the bus bombing that took place in Jerusalem, on April 19, 2016. Rachel was moderately injured and her daughter is in critical condition. Bus route 12 exploded by a bomb in a suspected terror attack, leaving at least 15 people injured. Police are investigating if the incident was a terror attack. Photo by Hadas Parush/Flash90

Rachel Dadon speaks with the press at Hadassa Ein Karem hospital where she and her daughter are hospitalized after being injured from the bus bombing that took place in Jerusalem, on April 19, 2016. Rachel was moderately injured and her daughter is in critical condition. Bus route 12 exploded by a bomb in a suspected terror attack, leaving at least 15 people injured. Police are investigating if the incident was a terror attack. Photo by Hadas Parush/Flash90

Rachel Dadon speaks with the press at Hadassa Ein Karem hospital where she and her daughter are hospitalized after being injured from the bus bombing that took place in Jerusalem, on April 19, 2016. Rachel was moderately injured and her daughter is in critical condition. Bus route 12 exploded by a bomb in a suspected terror attack, leaving at least 15 people injured. Police are investigating if the incident was a terror attack. Photo by Hadas Parush/Flash90

Rachel Dadon speaks with the press at Hadassa Ein Karem hospital where she and her daughter are hospitalized after being injured from the bus bombing that took place in Jerusalem, on April 19, 2016. Rachel was moderately injured and her daughter is in critical condition. Bus route 12 exploded by a bomb in a suspected terror attack, leaving at least 15 people injured. Police are investigating if the incident was a terror attack. Photo by Hadas Parush/Flash90

Rachel Dadon arrives to speak with the press at Hadassa Ein Karem hospital where she and her daughter are hospitalized after being injured from the bus bombing that took place in Jerusalem, on April 19, 2016. Rachel was moderately injured and her daughter is in critical condition. Bus route 12 exploded by a bomb in a suspected terror attack, leaving at least 15 people injured. Police are investigating if the incident was a terror attack. Photo by Hadas Parush/Flash90

Rachel Dadon speaks with the press at Hadassa Ein Karem hospital where she and her daughter are hospitalized after being injured from the bus bombing that took place in Jerusalem, on April 19, 2016. Rachel was moderately injured and her daughter is in critical condition. Bus route 12 exploded by a bomb in a suspected terror attack, leaving at least 15 people injured. Police are investigating if the incident was a terror attack. Photo by Hadas Parush/Flash90