. >> reporter: peter kowalski should know. he controls that flow. really.ow much water comes over niagara falls. down to the nearest half of an inch. >> that's crazy. >> absolutely. >> reporter: the nia states and canada. peter is the ultimate middleman, the man on the dam. this is like a neutral zone. >> it is, it is a neutral zone. liken it to switzerland, a country to itself. >> reporter: peter's domain, a concrete pier of power, where massive gates move on his orders to provide the falls their oomph. >> this is how we control the flow of water over the falls. >> reporter: only a fraction of the river's waters go over the falls. hydroelectric power stations downriver in new york and ontario get most of the rest. peter's the guy who decides who gets what. >> the u.s. says, give me more of this, and canada says, give me less of that. >> it does sometimes take a bit of negotiating. and collaboration. and we do what's fair and equitable. >> reporter: responsible to millions of power customers, two countries, and a world-famous tourist attraction, peter kowal

responsible to millions of power customers, two countries, and a world-famous tourist attraction, peter kowalski is that guy. unafraid to get his feet wet. harry smith, nbc news, niagara falls. >>> and that's going to do it for us on this wednesday night. i'm lester holt. for all of us at nbc news, thank you for watching, and good night. right now at six. a bullet hole at san jose's city hall. tonight -- the investigation intensifies. ==jess/2-shot== i'm jessica aguirre.s. ==raj/2-shot== and i'm raj mathai. deliberate attack?leor a raj/otsvo police are activly and agressivly on this case. someone shot out a window at the city hall -- of the bay area's biggest city. it was discovered -- early this morning. nbc bay area's michelle roberts is in san jose -- with the details. michelle? police do have full

father kowalski: because we came here with education, with culture, and people are ready to work, theyay taxes. and yes, i think we enrich this country. >> the eu opponents are out in force of the streets. they say that eu migrants that are already in britain should be allowed to stay. but they want more controls introduced to restrict the flow of future immigrants. even agnes agrees, that not everyone should be allowed into britain. agnes: we never ever claimed anything. we work hard. so if you want to work hard, there is a place for you here. you can just find a job and work. but if you think you will come here and you will be claiming benefits, i think that is a mistake, to be honest. >> agnes and zbigniew want to stay in boston and work for good relations between the polish community and the rest of the town. in his karate club, zbigniew works with children from ten different nations. zbigniew: community integration is possible. for all of us, including british people, it would be better for everybody if all europe would be united. agnes: england is made up from immigrants. it is n

responsible to millions of power customers, two countries, and a world-famous tourist attraction, peter kowalskiid to get his feet wet. harry smith, nbc news, niagara falls. >>> and that's going to do it for us on this wednesday night. i'm lester holt. for all of us at nbc news, thank you for watching, and good night. . >>> richard simmons secretly living as a woman? >> the explosive new cover story. fact or fiction now on "extra." ♪ ♪ ♪ ♪ ♪ >> extra! extra! >>> richard simmons, the new caitlyn jenner reborn as a woman named fiona? never-before-seen photos of the reclusive weight loss guru dressed up in wigs and fur. richard's reps taking on the headlines today. >> i have a very life. i just package it in fun wrapping and a bow. >>> hillary makes history. >> it's kind of thrilling! >> what mrs. clinton told mario about shattering that glass ceiling. >> if you become the first female president of the united states what does that mean for my daughter gia? >> for her possible runningmates to the big question, is it time to sit down with bernie? >> then the bachelorette's bff becca is here taking on

chase kowalski, age 7. jeffrey lewis, age 6. age 6.rquez green, james, age 6. .race mcdonald, age 6 age 6. emily parker, age 6. jack hinto, age 6. noah, age 6. 6.roline, age .essica, age 6 avil richman, age 6. benjamin wheeler, age 6. 6.ison wyatt, age 0hose brave educators and 2 first graders were gunned down gun whoerican with a never should have had one. voting in my pocket is a card. this is our sacred duty, to protect and defend the constitution of the united states and to work with our colleagues from across this country and cast our vote for laws to do that. thiscard is meaningless on subject. 3 1/2e been denied years ago. we've not had one single vote, not even a hearing on a single bill dealing with gun violence prevention. not one. when the speaker of the house say this is a city stung, i tell that to the new town families. tell that to the orlando families. tell that to the 100,000 americans families who have loved ones die in the last 3 1/2 years. that is not a publicity stunt. it is a crisis. it demands that this ho

father kowalski: because we came here with education, witith culture, and people are ready to work, they taxes. and yes, i thihink we enrich ths country. >> the eu opponents are out in forcrce of the streets. they say that eu migrants that are already in britain should be allolowed to stay. but they want more controls introduced to restrict the flow of future immigrants. even agnes agrees, that not everyone should be allowed into britain. agnes: we never ever claimed anything. wewe work hard. soso if you wantnt to work hard, there is a place for you here. you can just find a job and work. but if you think youou will come here and you will be claiming benefits, i think that i is a mistake, t to be honest. >> agnes and zbigniew want to stay in boston and work for good relations between the polish community and the rest of the town. in his karate e club, zbigniniew works with children from ten different nations. zbigniew: community integration is possible. for all of us, including british people, it would be better for everybody if all europe would be united. agnes: england is made up from