here's cnn's senior aviation correspondent pete munteen. >> reporter: the newest demand facing pent-upent-up frustrations in the sky with federal agencies citing a serious surge of in-flight fights. in a new letter southwest airlines flight attendants say unruly passenger incidents are becoming inaulerable and more aggressive. these images are from a southwest flight on sunday when a flight attendant had two teeth knocked out by a passenger according to their union. >> they seemed to be almost angry before they step onboard the aircraft, and they are verbally attacking flight attendants, calling them names, pulling on their lanyards, getting aggressive. we've had to deal with almost riot-like incidences. >> reporter: even if you're fully vaccinated masks are still required on all public forms of transportation and in terminals by the tsa. it is now investigating 1,300 cases of people violating that mandate. the federal aviation administration says it has received 2,500 reports of unruly passengers just this year. 1,900 of them about mask compliance. >> started antagonizing other passen

pete munteen, cnn. >>> movie goers are mourning the loss of an actress.e in steel magnolias. but her role as sher's mother in the 1987 film moonstruck that ran her award for best supporting actress. she's appeared in dozens of films and broadway and tv. she was a cousin of former massachusetts governor michael dukakis who ran for presidentin 1988. we'll be right back. than lysol spray. it's a simple fact: it even kills the covid-19 virus. science supports these simple facts. there's only one true lysol. lysol. what it takes to protect. [whisper] air wick our essential mist transforms fragrance infused with natural essential oils into a mist. from a cordless diffuser that gives you the freedom and control to awaken your home with the fresh and calming scents of nature. it's air care, redefined. for an experience you can see... ... smell... ...and feel . air wick essential mist. connect to nature. never run dry of... killer attitude. or hydration. neutrogena® hydro boost. the #1 hyaluronic acid moisturizer delivers 2x the hydration for supple, bouncy skin.

pete munteen explains why delta believes it is safe. >> the era of social distancing on board is over. delta is now going to sell every seat on every airline can be filled. >> reporter: the newest changes to the pandemic era air travel are going to make it look more like before the pandemic. delta started to resume selling is middle seats saturday and something that all major carriers did months ago. >> it is safe to get back out there and go out into world and see the folks in your life. >> ronjohn says that he estimates 75% of delta passengers have received at least one dose of the coronavirus vaccine and they could not continue to cap it without the capping of the seats. >> we could not continue to cap the limits. >> and they say that the first dose reduces the impact by 50%. and now they are not going to stop the masks as reduced by the biden administration. they say that the masks makes the transmission rates very low regardless where you sit. >> it is the two things at the same time do greatly reduce the rate at air travel and provides a safe opportunity for people given the ven