combat in these light infantry units which includes some artillery and armored divisions but defend, again, most women are not serving in direct cop bat units in israel. they are not barred from doing so. they have however joined the border patrol recently and they have been a very lethal force on the border. in fact some very high-profile incidents of late where they killed some intruders in the sinai desert. jon: jennifer griffin at the pentagon. jennifer, thank you. arthel: well the doctor is in and she is here too talk about on an aggressive new strain of norovirus that has been sweeping the global. well it has taken hold here in the u.s. the centers for disease control reports that since september the new strain has caused more than 140 outbreaks nationwide. norovirus spreads quickly through large groups and causes bouts of volume iting and vomiting and diarrhea. we have lee van nokia cure,