In this Friday, February 13, 2015 photo, Israeli high-school seniors preparing to join the Israeli military later this year take part in a privately run training camp for military combat fitness near Yakum, central Israel. (Photo by Oded Balilty/AP Photo)

In this Friday, February 13, 2015 photo, Israeli high-school seniors crawl through grass during an exercise at a privately run training camp for military combat fitness near Yakum, central Israel. (Photo by Oded Balilty/AP Photo)

In this Tuesday, March 24, 2015 photo, Israeli high-school seniors preparing to join the Israeli military participate in an urban fighting drill as part of privately run military combat fitness training, in Kibbutz Mizra, northern Israel. (Photo by Oded Balilty/AP Photo)

In this Tuesday, February 17, 2015 photo, Israeli high-school seniors are instructed on the AK-47 assault rifle as part of a privately run military combat fitness training as part of privately run military combat fitness training to prepare for national military service in Netanya, central Israel. (Photo by Oded Balilty/AP Photo)

In this Tuesday, March 24, 2015 photo, Israeli high-school seniors preparing to join the Israeli military participate in an urban fighting drill as part of privately run military combat fitness training, in Kibbutz Mizra, northern Israel. (Photo by Oded Balilty/AP Photo)

In this Friday, February 27, 2015 photo, an Israeli high-school senior preparing to join the Israeli military later this year participates in a privately run training camp for military combat fitness near Yakum, central Israel. With a mandatory three-year military service looming after graduation, teenage boys, and increasingly girls too, are gearing up for the draft, getting into shape and trying to improve their chances of acceptance into elite combat units. (Photo by Oded Balilty/AP Photo)

In this Tuesday, March 24, 2015 photo, Israeli high-school seniors preparing to join the Israeli military participate in an urban fighting drill as part of privately run military combat fitness training, in Kibbutz Mizra, northern Israel. (Photo by Oded Balilty/AP Photo)

In this Tuesday, February 17, 2015 photo, Israeli high-school seniors train on usage of the AK-47 assault rifle as part of privately run military combat fitness training to prepare for national military service in Netanya, central Israel. (Photo by Oded Balilty/AP Photo)

In this Thursday, March 5, 2015 photo, Israeli high-school seniors preparing to join the Israeli military later this year walk into the sea carrying weighted bags during privately run military combat fitness training in Shefayim, central Israel. (Photo by Oded Balilty/AP Photo)

In this Friday, February 27, 2015 photo, an Israeli high-school senior preparing to join the Israeli military later this year participates in a privately run training camp for military combat fitness near Yakum, central Israel. (Photo by Oded Balilty/AP Photo)

In this Friday, February 27, 2015 photo, an Israeli high-school senior preparing to join the Israeli military later this year drags a tire through mud at a privately run training camp for military combat fitness near Yakum, central Israel. (Photo by Oded Balilty/AP Photo)

In this Tuesday, March 24, 2015 photo, an Israeli high-school senior preparing to join the Israeli military participates in an urban fighting drill as part of privately run military combat fitness training, in Kibbutz Mizra, northern Israel. (Photo by Oded Balilty/AP Photo)

In this Friday, February 13, 2015 photo, Israeli high-school seniors preparing to join the Israeli military later this year huddle during an exercise at a privately run training camp for military combat fitness near Yakum, central Israel. (Photo by Oded Balilty/AP Photo)

In this Thursday, March 5, 2015 photo, Israeli high-school seniors preparing to join the Israeli military later this year lie in foxholes during privately run military combat fitness training in Shefayim, central Israel. (Photo by Oded Balilty/AP Photo)

In this Friday, February 13, 2015 photo, Israeli high-school seniors preparing to join the Israeli military later this year crawl out of mud up to a grassy embankment during an exercise at a privately run training camp for military combat fitness near Yakum, central Israel. (Photo by Oded Balilty/AP Photo)

In this Tuesday, March 24, 2015 photo, an Israeli high-school senior rests during urban fighting drill as part of a privately run military combat fitness training as part of privately run military combat fitness training to prepare for national military service in Kibbutz Mizra, northern Israel. (Photo by Oded Balilty/AP Photo)

In this Thursday, March 5, 2015 photo, an exhausted Israeli teen is helped by an instructor during an exercise at privately run military combat fitness training in Shefayim, central Israel. (Photo by Oded Balilty/AP Photo)

In this Thursday, March 5, 2015 photo, Israeli high-school seniors preparing to join the Israeli military later this year are splashed by a sea wave during privately run military combat fitness training in Shefayim, central Israel. (Photo by Oded Balilty/AP Photo)