Question: What does the Challenger 2 have in common with the Challenger 1?

Context paragraphs:
Bangkok International Motor Show: The Bangkok International Motor Show takes place in Bangkok, Thailand the Motor Show is also known as the "Thailand Motor Show" among automotive enthusiasts.  The show takes place annually at the Challenger 1-3, Impact, Maung Thong Thani Exhibition center in Bangkok, Thailand.  The Bangkok Motor Show was the first Motor Show in Thailand and is the biggest Annual Auto Show in Thailand.

2016 Columbus Challenger 2: The 2016 Columbus Challenger 2 was a professional tennis tournament played on indoor hard courts.  It was the third edition of the tournament which was part of the 2016 ATP Challenger Tour.  It took place in Columbus, United States between 21 and 27 November 2016.

2014 Latrobe City Traralgon ATP Challenger 2: The 2014 Latrobe City Traralgon ATP Challenger 2 was a professional tennis tournament played on outdoor hard court.  It was the third edition of the tournament which was part of the 2014 ATP Challenger Tour.  It took place in Traralgon, Australia between 3 – 9 November 2014.  It was the second of two Traralgon Challengers in 2014.

2016 Columbus Challenger 1: The 2016 Columbus Challenger 1 was a professional tennis tournament played on indoor hard courts.  It was the second edition of the tournament which was part of the 2016 ATP Challenger Tour.  It took place in Columbus, United States between 19 and 25 September 2016.

2014 Latrobe City Traralgon ATP Challenger 1: The 2014 Latrobe City Traralgon ATP Challenger 1 was a professional tennis tournament played on outdoor hard court.  It was the second edition of the tournament which was part of the 2014 ATP Challenger Tour.  It took place in Traralgon, Australia between 27 October – 2 November 2014.  It was the first of two Traralgon Challengers in 2014.

MBT-80: The FV4601 MBT-80 was a British experimental third-generation main battle tank, designed in the late 1970s to replace the Chieftain tank.  It was eventually (and later controversially) cancelled in favour of the Challenger 1, itself an evolution of the Chieftain design.

2014 Latrobe City Traralgon ATP Challenger 1 – Doubles: 2014 Latrobe City Traralgon ATP Challenger 1 – Doubles

Challenger 2: The FV4034 Challenger 2 is a British main battle tank (MBT) in service with the armies of the United Kingdom and Oman.  It was designed and built by the British company Vickers Defence Systems (now known as BAE Systems Land & Armaments).

Challenger 1: The FV4030/4 Challenger 1 is a British main battle tank (MBT) used by the British Army from 1983 to the mid-1990s, when it was superseded by the Challenger 2.  It is also currently used by the Royal Jordanian Army as its main battle tank after heavy modifications.  The variants for the Jordanian military are to be upgraded using the unmanned Falcon turret.

Challenger Glacier (Washington): Challenger Glacier is in North Cascades National Park in the U.S. state of Washington and is on the north slopes of Mount Challenger.  Challenger Glacier descends from 8000 to .  Over 2 mi wide, Challenger Glacier descends along a wide terminus with heavy crevassing and numerous icefalls, with a tongue of the glacier in the north descending to a proglacial lake.  The ascent up Challenger Glacier is one of the most common routes to the summit of Mount Challenger.

Supporting paragraphs: Challenger 1 Challenger 2
Answer: British main battle tank