roxana saberi reports from kiev, where president trump's growing dilemma has put ukraine's president in the spotlight. >> reporter: ukraine's media-savvy president is used to cameras, but these days, he tries to avoid them when it comes to questions about president trump. were you told that you had to launch an investigation into the bidens, or promise an investigation, just to visit the white house? mr. zelensky has said mr. trump didn't pressure him to investigate the bidens, but text messages appear to show u.s. diplomats promised he could visit the oval office if he announced an investigationed into ukranian natural gas company burisma, where hunter biden was on the board. and on friday, ukraine's new prosecutor general said he'll review several past investigations, some involving the ownerf burisma, though, he said no one had pressured him to do so. >> i never met rudy giuliani, never. >> reporter: before mr. zelensky had to deal with this international drama as president, he was a comedian who played a president on ukranian tv. the show made him so popular, mr. zelensky launche

roxana saberi starts us off tonight. >> with turkey announcing plans to push its onslaught against kurdishorces even farther into syria, defense secretary mark esper told margaret brennanon "face the nation" the u.s. will withdraw its roughly 1,000 troops remaining in the area. >> how long and over what time period will you be talking about. >> it will be a dlit rat withdrawal and we want to conduct as safely and quickly as possible. >> even before this news kurdish forces were no match for turkey. cbs's charlie d'agata on the ground in syria spoke to a senior commander of the democratic forces, america's ally in the fight against isis. >> what is your message to president trump? >> we fought beside his soldiers for many years, he said. we were brothers in recall as. he promised he would protect the kurds but he has done nothing. secretary esper says kurdish authorities are now turning to syria and russia to de fend themselves from turkish forces. >> it sounds a lot like they were being left to be slaughtered. so what choice were they left other than to find someone else to protect them. >

roxana saberi, cbs news, london. >>> tonight, president trump is facing a new round of biparss backlashver his decision to withdraw all u.s. troops from northern syria. lawmakers are expected to introduce legislation this week to address the crisis. also this week, new revelations in the impeachment inquiry could put the president on the defensive. nikole killion is at the white house. >> i'm an island of one again. >> reporter: as president trump defended his initial decision to pull out ous forces from northern syria, democrats and republicans sounded the alarm. >> pulling back those 50 troops or whatever it was has given license to turkey. and then now, i think, puling out the remaining 1,000 in syria is an excuse to get out. >> i can think of nothing more disgusting in all the years i've been in congress than what this president is allowing to happen with the kurds. >> reporter: members of the president's national security team said they are meeting to monitor the situation with president warning treasury is ready to go with more sanctions against turkey. >> these sanctions could be

roxana saberi is at the scene and has the shocking video livestreamed by the gunman >> reporter: theuspect broadcast his rampage live online, showing off his weapons and ammunition in a car before efrning his gun on a woman walking by. rie shooter then tries to break tnd shoot his way into a synagogue, but the door doesn't open. inside, dozens of worshippers were observing judaism's holiest holiday, yom kippur. rebecca blady who moved from new york to berlin earlier this year was one of them. >> they told us, "get out of here. go deeper into the synagogue building, go upstairs-- >> reporter: police say when the shooter couldn't get into the genagogue he entered a nearby kabob shop and killed a man. hours later they arrested the suspect seen in a livestreamed video. a german man identified by local media as 27-year-old stephan aslliet. >> it was really terrifying and airitually, also, a very deep experience. >> reporter: it deepened your faith. >> i have to say yes. i mean, i'm here. >> reporter: anti-semitic crimes are on the rise here in germany. the government says they jumped near

that country's new prosecutor made a major announcement today, and roxana saberi is in kiev. >> reportere announcement came as a surprise. ukraine's new top prosecutor ouid his office is reviewing several past investigations, including around 15 having to do with the owner of the ukrainian natural gas company burisma, where hunter biden served on the board. >> thank you very much. >> reporter: the timing raises questions about whether ukraine is caving in to calls by president trump to investigate the bidens. on their july 25 phone call, president volodymyr zelensky told mr. trump, "the next prosecutor general will be 100% my person who will look into the situation." and the text messages released last night appear to show that the ukrainian president expected a visit to the oval office in exchange for announcing an investigation into burisma. today, president zelensky tried to avoid our questions. were you told that you had to launch an investigation into the bidens or promise an investigation just to visit the white house? >> reporter: but several former ukrainian officials, including

roxana saberi has the story from the greek island of lesbos. >> reporter: for many migrants and refugeeshere in europe. off the coast of the greek island of lesbos, come cries for help: a dingy has capsized flinging frightened passengers into the sea. these afghan migrants all survived thanks to this small crew. their name is refugee rescue, and their mission is to save lives when people seeking safety and stability dare to cross this perilous stretch of water from turkey to greece. it's about six miles from turkey, which is right behind us to lesbos, which is right over here. turkey is home to the world's largt refugee population. the number of people fleeing to lesbos has soared, the u.n. said, to more than 16,000 so far this year. that's the biggest influx since 2016. as the only n.g.o. left in lesbos with a rescue boat, they are working overtime all the time. >> we are tired. we are tired. but that's our job. >> reporter: in the middle of the night, we watched as they helped bring dozens of afghan migrants to shore. that's where we met zara and her 18 month old son. she said, we had

for "cbs this morning," roxana saberi, greece. >> incredible footage. >> yeah. >> every time i see itess it's safer than the land. >> what they're coming in shows what they're fleeing -- >> we're all migrants or descendants of migrants. we've been walking around a long time. this is happening today. >> you see people literally risking their lives to come to this country. >>> world champion sprinter allyson felix just ran into the history books only ten months after an emergency c-section. she has the most world championship gold medals a beating usain >> good morning everyone it is a 25>> good morning everyone it is a 20 5 am and i am michelle greer go, tens of thousands of people are without power this morning and the largest pg&e power shut off to date but these shutoffs will happen in waves and about 280, 000 customers are starting to lose power this morning and crews are rushing to install generators in the caldecott tunnel, the tunnels will stay open throughout the day. also this morning a small earthquake rattled san jose's alan rock. the magnitude 3 point 3.2 wake hit this morn

roxana saberi has the story. >> 8,500,000. >> reporter: with a mix of suspense. >> alex, are we goingsold! >> reporter: soaring prices and glamour. >> it's live around the world. >> reporter: sotheby's has turned into one of the top fine art auction houses in the world. but what's now a $4 billion business in 40 countries -- >> and a very warm welcome to sotheby's london. >> reporter: putting on more than 400 auction as year started with the sale of scarce second-handbooks in london 275 years ago. the man wielding the first gavel was samuel baker, a book seller in and the company's founder. through the centuries sotheby's expanded from aristocrat tick libraries into jewelry, estates and art. >> when i came to sotheby's, there were 120 employees. >> reporter: marcus linelle is sotheby's longest employee. he joined in 1976 as a 16-year-old trainee. two years later he snuck into what turned out to be the biggest sale yet in the company's history. >> and the room was totally packed with celebrities, need i say. >> reporter: nearly $2 million worth of paintings gone in just 21 minutes. >>

as roxana saberi reports from kiev, president trump's call to investigate the bidens has catapulted ukraine's president into the kr p is used to cameras. >> pays the rent. >> reporter: but these days he tries to avoid them when it comes to questions about president trump. >> were you told that you had to launch an investigation into the bidens or promised an investigations just to -- >> no. everything about the bidens -- >> reporter: mr. zelensky said mr. trump didn't pressure him to investigate the bidens, but texts appear to show u.s. diplomats promised he could visit the oval office if he announced an investigation into the ukrainian natural gas company d nspector gener s he'll review past investigations, some involving the own of berezma though he said no one pressured him to do so. >> i've never met r comedian wh played a president on ukrainian tv. his character was a teacher propelled into the presidency accidentally. [ applause ] the show made him so popular, mr. zelensky launched a political party named after it -- servant of the people. winning this year's presidential election in a