Question: Bridge of Spies tells the story of an American lawyer who ultimately became what?

Context paragraphs:
Raynal Bolling: Raynal Cawthorne Bolling (September 1, 1877 – March 26, 1918) was the first high-ranking officer of the United States Army to be killed in combat in World War I.  A corporate lawyer by vocation, he became an early Army aviator and the organizer of both of the first units in what ultimately became the Air National Guard and the Air Force Reserve Command.

WSYY-FM: WSYY-FM (94.9 FM) is a radio station broadcasting for approximately 18¼ hours per day, 7 days a week (from 4:55AM through 11:10PM ET) under the slogan, ""Radio With An Attitude"".  Playing a mix of oldies/classic hits, adult contemporary, rock music, and some country crossovers, the station broadcasts an Adult Hits/Full-Service format for approximately 16 hours per day, from 6:00AM through 10:00PM ET (reserving the first and, also, the final hour of their broadcast day to "When Radio Was").  "The Mountain 94.9" carries local high school sports in season.  "The Mountain 94.9" had also carried the complete schedule of Red Sox Baseball (from 1997 through 2015, prior to becoming a Former Affiliate in 2016, which was when Millinocket's affiliation with the Red Sox Baseball would ultimately be transferred over to co-owned WSYY-AM, thus concluding the frequent interruptions to the music on "The Mountain 94.9" during Baseball season).  The station currently features programming from CBS Radio and carries CBS Radio News at the top of every hour (and has been an affiliate of that network for many decades).  Licensed to Millinocket, Maine, United States, the station's broadcast signal serves the Central Penobscot County, Eastern Piscataquis County, and Southern Aroostook County Maine areas, and the station is licensed to serve the town of Millinocket, Maine, the very town where its studios/offices and tower site are located.  The station is currently owned by Katahdin Communications, Inc.  WSYY-FM originally went on the air in 1978 on 97.7 FM as WKTR, upgrading to its current facilities in 1984 on 94.9.  Prior to their "The Mountain 94.9" branding, WSYY-FM used to be referred to as "North Country 95", airing a full-time Country Music format.  The current format, branding, and slogan was probably adopted around March 1, 2004, when Katahdin Communications, Inc. assumed control of WSYY-FM & WSYY-AM from Katahdin Timberlands, LLC (as a result of the radio station facing increasing land disputes), initially as a short term lease agreement but the transfer of ownership ultimately became permanent.  Those same land disputes would eventually lead to a loss of WSYY-FM's 23,500 watt transmitter location (featuring an antenna HAAT of 211 meters); as a result, WSYY-FM may have been operating under a Special Temporary Authority License (a 12,000 watt facility with an antenna HAAT of 68 meters via Hammond Ridge on Lake Road, about two miles from Millinocket Municipal Airport), ever since as long ago as late 2007, pending a planned permanent move to a 22,000 watt facility with an antenna HAAT of 198.4 meters (from just off Nicatou Road in Medway, well east of WSYY-FM's old or current transmitter tower location).  On November 23th, 2016, the CP for this proposed move was modified to a 45,000 watt facility with an antenna HAAT of 146.7 meters, the first time this proposed move has ever received official approval from the FCC.  WSYY-FM is one of the two Maine affiliates—apart from WLOB—of When Radio Was (7 days a week from 5:00AM through 6:00AM ET and also from 10:00PM through 11:00PM ET), is one of the two Maine affiliates (WWMJ) of The Acoustic Storm (Saturdays from 9:00AM through 12:00PM ET), is Maine's only affiliate of the Crook & Chase syndicated Country Music countdown programming (Sunday afternoons from 2:00PM through 6:00PM ET), and is an affiliate of the Blues Deluxe radio show.  WSYY-FM/WSYY-AM are unusual in that while these stations are authorized to broadcast 24 hours a day, the stations both have sign-offs every day (WSYY-AM signing off at sun-down, broadcasting only on Weekends (but not between Monday-through-Friday) and WSYY-FM broadcasting for approximately 18¼ hours per day, 7 days a week, WSYY-FM's broadcast day concluding with the 11:00PM ET Top-of-the-Hour CBS Radio newscast and then a Nightly Sign-Off Announcement and then an instrumentation of the American national anthem, followed by Dead Air amidst a Transmitter Power-Down, not Signing Back Onto The Air until 4:55AM ET).  In Old Town and also Bangor (and continuing southward and/or southwestward), the station has strong FM co-channel interference with Portland-market WHOM (which transmits from atop Mount Washington in New Hampshire, the tallest peak in the Northeast and had for a long time claimed on its website that it has the largest coverage area of any FM station in the United States, its signal spanning five states: NH, ME, VT, MA, NY and also parts of Southern Quebec Province, Canada), this matter being especially problematic before dawn or after dusk.  In favorable atmospheric conditions, a very weak signal of WHOM can be DX-ed in Millinocket during overnight hours (when WSYY-FM is off-the-air).

Alice N' Chains: Alice N' Chains was an American glam metal band from Seattle, Washington formed in 1986 by former members of Sleze.  Towards the end of their run as Sleze, discussions arose about changing their name to "Alice in Chains".  However, due to concerns over the reference to female bondage, the group ultimately chose to spell it as Alice N' Chains.  They performed under this moniker over about a 12-month period and recorded two demos before breaking up on friendly terms in 1987.  One of its members, Layne Staley, ultimately took the name that he and his former bandmates had initially flirted with when he joined a different group a few months later that ultimately became known as Alice in Chains.

James B. Donovan: James Britt Donovan (February 29, 1916 – January 19, 1970) was an American lawyer, United States Navy officer in the Office of Scientific Research and Development and the Office of Strategic Services, ultimately becoming General Counsel of the OSS (the predecessor of the CIA), and international diplomatic negotiator.

Harry Blackmun: Harry Andrew Blackmun (November 12, 1908March 4, 1999) was an American lawyer and jurist who served as an Associate Justice of the Supreme Court of the United States from 1970 until 1994.  Appointed by Republican President Richard Nixon, Blackmun ultimately became one of the most liberal justices on the Court.  He is best known as the author of the Court's opinion in "Roe v. Wade", which prohibits many state and federal restrictions on abortion.

Thomas Brittain: Brittain was born at Sheffield on 2 January 1806.  He was educated at a private school.  He was engaged during the greater part of his life as a professional accountant, but became interested in natural science, and was very skillful in the preparation of diagrams and in the mounting of objects for the microscope.  In 1842, he moved to Manchester, where he spent the rest of his life.  In some contributions to Axon's "Field Naturalist", he told the story of his scientific studies from the time of his first microscope, which he obtained in 1834.  In December 1858 he was one of the promoters of a Manchester Microscopical Society, which ultimately became a section of the Manchester Literary and Philosophical Society.  When a second Manchester Microscopical Society - a more popular association - was established in 1879, he repeatedly held the office of vice-president, and was afterwards president.  On his retirement, from failing health and advanced years, he was presented with an address at the Manchester Athenæum, 4 October 1883.

Bridge of Spies (film): Bridge of Spies is a 2015 historical drama legal thriller film directed and co-produced by Steven Spielberg, written by Matt Charman, Ethan and Joel Coen and stars Tom Hanks, Mark Rylance, Amy Ryan, and Alan Alda.  Set during the Cold War, the film tells the story of lawyer James B. Donovan, who is entrusted with negotiating the release of Francis Gary Powers—a U.S. Air Force pilot whose U-2 spy plane was shot down over the Soviet Union in 1960—in exchange for Rudolf Abel, a convicted Soviet KGB spy held under the custody of the United States, whom he represented at trial.  The name of the film refers to the Glienicke Bridge, which connects Potsdam with Berlin, where the prisoner exchange took place.  The film was an international co-production of the United States and Germany.

That's So Raven (season 4): The fourth and final season of "That's So Raven" aired on Disney Channel from February 20, 2006 to November 10, 2007.  This season ultimately became the final season of the show, closing the chapter on the story of the Baxter family, which now consists of only Raven Baxter (Raven-Symoné), Cory Baxter (Kyle Massey), and Victor Baxter (Rondell Sheridan), following T'Keyah Crystal Keymáh's departure from the show in the third season as the matriarch, Tanya Baxter.  Anneliese van der Pol and Orlando Brown reprise their roles as Chelsea Daniels and Eddie Thomas respectively.

CBGB (film): CBGB is a 2013 American historical film about the former New York music venue CBGB.  It follows the story of Hilly Kristal's New York club from its concept as a venue for Country, Bluegrass and Blues (CBGB) to what it ultimately became: the birthplace of underground rock'n'roll and punk.  The film uses devices such as a comic-book styled panels as well as on-screen text to identify important figures in the punk movement.

Before the League: Before The League is a documentary series on the history of professional American football that ultimately became the NFL.  The series debuted at the Pro Football Hall of Fame on October 27, 2015.  The film is broken into a six parts which tell the story of the evolution from rugby to the formation and creation of the American Professional Football Association in 1920.  The series aired on Time Warner Cable SportsChannel on November 17 and 18, 2015.

Supporting paragraphs: Bridge of Spies (film) James B. Donovan
Answer: General Counsel of the OSS