michael okwu travels to the wilds of alaska. firsthand look of what's at stake. >> reporter: buried in these hills is a treasure worth half a trillion dollars. the mother load is known as simply the pebble deposit. pebble contains the largest untouched reserve of copper in the world. some 80 billion pounds of it along with thousands of tons of gold. mike is with the mining company that plans to unearth the fortune. >> 700 million that will strike an 86 mile road. could be he mined for generations. >> reporter: if you haven't heard of pebble that's no surprise. its remote location has helped keep it from the public eye. located 200 miles southeast of anchorage, it is accessible only by air. but chances are you're going to hear more about pebble soon. its fate is one of the biggest environmental situations facing the obama administration since the keystone pipeline. according to company documents getting the metal out of the ground will mean digging one of the largest open pit mines on the planet. eventually that hole could be mor

. >> correspondent michael okwu, los angeles county jail, where even the prosecutor who put them there, say, they don't belong. >>> and he's no longer boss, but on d.c. streets, he's still known as mayor for life. washington's washington's washington's marion barry. >> i have a philosophy. a setup is for a come back. >>> and good evening, thanks for joining us, i'm joie chen, welcome to "america tonight," the weekend edition. it is a shocking statistic. one study finds u.s. prisons are home to ten times as many mentally ill people as state psychiatric hospitals. as aasigh legals were shut down and budgets made community support scarce, prisons have become the repositories for the mentally ill in america. "americ "america tonight's" michael okwu finds a surprising campaigner for change. >> it's shocking enough to witness firsthand. a collection of men confined to the prison of their own minds. broken, vulnerable and in unrelenting pain. more shocking perhaps to know that the nation's largest caretaker of the mentally ill is right here. the twin towers correctional facility, los angeles

"america tonight's" michael okwu brings us the story of why these soldiers choose to fight so far from home. >> if i do get called of course i would go, i'd be on the next plane. >> 26-year-old katy freeman could be called up for military service at any time. not to the u.s. army but to a fighting force more than 7500 miles away. she's one of thousands of so-called lone soldiers, member of the jewish diaspora who voluntarily enlist in the are jewish defense force or idf. 6,000 other nonisraelis fighting for the idf in the currently conflict. >> as much as i'm proud to be an american and i'm thankful i was born here and got to grow up here i wouldn't trade that for anything, when you're in israel it is the feeling of belong. being home. if it's under attack you would do anything to protect it. >> freeman said she knew she wanted to serve after vistaing israel for the first time when she was 16. >> i got there and just kind of fell in love with everything. with everything, you know the good parts of it. the bad parts of it. you walk down the street and you know everybody. this connection

michael okwu, good to see you. >>> their job is to protect and serve. but in one major city several officers find thems on the opposite -- themselves on the opopposite side of the law. you can't believe what they've been accused of doing. we first addressed the issue in december but now there's moosh to the story. a reprieve handed down by a federal judge. >> investigating a dark side of the law >> they don't have the money to puchace their freedom... >> for some...crime does pay... >> the bail bond industry has been good to me.... i'll make a chunk of change off the crime... fault lines... al jazeera america's hard hitting... >> they're locking the door... ground breaking... >> we have to get out of here... truth seeking... >> award winning, investigative, documentary series. chasing bail only on al jazeera america >> now a snapshot of other stories making headlines on "america tonight." utility crews in los angeles are working around the clock repairing damage from a ruptured 93-year-old water plain. the flooding occurred as california is suffering on

michael okwu, good to see you. >>> their job is to protect and serve. but in one major city several officers find thems on the opposite -- themselves on the opopposite side of the law. you can't believe what they've been accused of doing. we first addressed the issue in december but now there's moosh to the story. a reprieve handed down by a federal judge. >> there is a tendency to downplay human rights in favor of commercial interests >> harsh realities of a world in crisis >> governments care about their reputation... >> can roth, head of human rights watch >> with adequate pressure you can stop anybody's abuse. >> every saturday join us for exclusive, revealing, and surprising talks with the most interesting people of our time. >> talk to al jazeera only on al jazeera america >> investigating a dark side of the law >> they don't have the money to puchace their freedom... >> for some...crime does pay... >> the bail bond industry has been good to me.... i'll make a chunk of change off the crime... fault lines... al jazeera america's hard hitting... >>

michael okwu has the story. >> three years after the fukushima daiichi disaster, the california plant is the only one left in the state. >> do you want this plant shut down and every nuclear plant shut down tomorrow? >> i want every plant in the united states shut down today. >> i traveled to fukushima last year and found out firsthand what happens when nuclear energy goes wrong. >> 3.2 microseverts per hour, that's the largest level be since we've been here in japan. >> the eary on going disaster an ocean away has level many americans skittish about nuclear power. the accident at two mile island had already eroded support for a form of energy that had been popular with americans after the 1973 oil embargo . and the film "china syndrome" in spheres. >> can you not promote a technology that produces the most toxic substance on earth and also protect the public. >> polls show that more than half of americans oppose increasing nuclear energy and nearly 75% don't think government should help build new plants. but now a growing and unlikely movement thinks the american public is wrong. mic

. >> "america tonight"'s michael okwu brings us this game changing story. at the top of the hour. >> adam thank you. >>> lawsuit against president obama. republicans accused the president of overstepping his authority. they claimed he needed authority before being. the white house says the president was just using his executive authority and called the lawsuit a waste of taxpayer money. >>> water donations coming into detroit. outside areas are trying ohelp after the i city's crack down on people unable to pay their water bills. bisi onile-ere reports. >> outside this detroit church. ♪ >> over a thousand gallons of donated water passed through hands of a group of volunteers. they're here in support of residents who have lost their water service. >> they had thousands of people in detroit that don't have water. >> still? >> still. it is just unspeakable what's going on here. >> reporter: out roughly $90 million in unpaid bills, in may the city of detroit massed a shutoff initiative. it sparked outrage with the united nations, calling the aggressive plan inhu

. >> correspondent michael okwu, los angeles county jail, whe