Question: WhatAmerican multinational engineering firm designed the Sutong Yangtze River Bridge. 

Context paragraphs:
Yiling Yangtze River Bridge: The Yiling Yangtze River Bridge () is a cable-stayed bridge over the Yangtze River in the city-center of Yichang, Hubei.  It has 3 towers and two main spans, with a total of 4 spans including the side spans.  It is a road bridge which carries four lanes of roadway and has a toll booth at one end.  The bridge has a singular cable tension system, which carries the deck from the center.  The Bridge crosses the Yangtze River, near Dagongqiao in Yichang.  The The main spans are 346 meters each.  At the end of the bridge, to the south there is a cloverleaf interchange after the toll booth which is and exchange for the road.

Chongming–Qidong Yangtze River Bridge: Chongming-Qidong Yangtze River Bridge or the Chongqi Bridge (), also called Chongqi Crossing Project (), is a bridge across the north fork of the Yangtze River, near the river's mouth between Chongming Island of Shanghai and Qidong in Jiangsu Province.  This bridge, along with the Shanghai Yangtze River Tunnel and Bridge to the south, forms the last crossing of the Yangtze River before the river empties into the East China Sea.  The bridge carries the six-lane G40 Shanghai–Xi'an Expressway, part of the National Expressway Network of the People's Republic of China.

Sutong Yangtze River Bridge: The Sutong Yangtze River Bridge (; ] , ) is a cable-stayed bridge that spans the Yangtze River in China between Nantong and Changshu, a satellite city of Suzhou, in Jiangsu province.

Baishazhou Yangtze River Bridge: The Baishazhou Yangtze River Bridge (), sometimes referred as the Third Wuhan Yangtze River Bridge for being the third Yangtze river bridge in Wuhan, is a highway bridge over the Yangtze River in Wuhan, Hubei Province, China.  It is located 6.8 kilometers southwest (upstream) of the First Bridge (which connects central Wuchang with central Hanyang).  The two bridge names come from the order of construction (it was built after the First and Second Bridges), and from the name of the small island (Baisha Zhou (白沙洲), i.e. "White Sand Island") located under the bridge.

Jingyue Yangtze River Bridge: The Jingyue Yangtze River Bridge () is a cable-stayed bridge over the Yangtze River between Jianli County, Hubei Province and Yueyang, Hunan Province in central China.  The Bridge opened in June 2010.  The bridge crosses the Yangtze River and is one of the 10 largest cable-stayed bridges in the world.  The bridge was tolled a few months after opening.

AECOM: AECOM ( ) (formerly known as AECOM Technology Corporation) is an American multinational engineering firm that provides design, consulting, construction, and management services to a wide range of clients.

Jiangyin Yangtze River Bridge: The Jiangyin Yangtze River Bridge () is a suspension bridge over the Yangtze River in Jiangsu, China.  The bridge has a main span of 1385 m connects Jiangyin south of the river to Jingjiang to the north.  When the bridge was completed in 1999, it was the fourth longest suspension bridge span in the world and the longest in China.  Several longer bridges have since been completed in China and abroad but it still ranks among the ten longest bridge spans in the world.  The bridge was also the furthest downstream on the Yangtze until the completion of the Sutong Yangtze River Bridge in 2008 and the Chongming–Qidong Yangtze River Bridge in 2011.

Anqing Yangtze River Bridge: Anqing Yangtze River Bridge is a cable-stayed bridge spanning 1040 m over the Yangtze River at Anqing, Anhui Province in eastern China.  The bridge is 31.2 m wide and carries four lanes of traffic on the G50 Shanghai–Chongqing Expressway between Anqing north of the river and Dongzhi County in Chizhou prefecture to the south.  The bridge opened on December 27, 2004 and was the 35th bridge across the Yangtze River between Yibin and Shanghai.  The bridge required investment of ¥1.3174 billion.

Peace Bridge (Foyle): The Peace Bridge is a cycle and foot bridge across the River Foyle in Derry, Northern Ireland.  It opened on 25 June 2011, connecting Ebrington Square with the rest of the city centre.  It is the newest of three bridges in the city, the others being the Craigavon Bridge and the Foyle Bridge.  The 235 m bridge was designed by AECOM, who also designed the Sutong Yangtze River Bridge, and Wilkinson Eyre Architects, who also designed the Gateshead Millennium Bridge.

Yangluo Yangtze River Bridge: The Yangluo Yangtze River Bridge () is a suspension bridge over the Yangtze River in Wuhan, Hubei, China.  With a main span of 1280 m , at its opening it was tied with the Golden Gate Bridge as the ninth longest suspension bridge in the world.  The bridge carries the G70 Fuzhou–Yinchuan Expressway and G4201 Wuhan Ring Expressway over the Yangtze River and provides easy access to both sides of the river as part of a larger plan to promote development in the eastern portion of the city.  Construction on the bridge began on November 4, 2003, and it opened to traffic on December 26, 2007.

Supporting paragraphs: Peace Bridge (Foyle) AECOM
Answer: AECOM