Original sentence: A condition of this sale is that the purchasers will donate one back to Port Alberni when they are retired, as a historical attraction.Just over a year later, on 12 October, 1962, the Caroline Mars was destroyed by Typhoon Freda while parked onshore.On 13 April 2007, TimberWest has announced the sale of both Martin Mars aircraft to Coulson Forest Products, a local forestry company in Port Alberni.On 25 October 2007, Hawaii Mars ("Redtail") arrived at Lake Elsinore in Southern California, negotiated through a private contract, to assist with the firefighting efforts containing the California wildfires of October 2007.The Mars will remain in the Alberni Valley, operating from their base at Sproat Lake.The two surviving tankers are now operated by the Coulson Group, based at Sproat Lake near Port Alberni, British Columbia.They also make appearances at local airshows, demonstrating their water-dropping ability.also flies the water bombers to other hotspots around the world if a need develops, such as in August 2003, when a large forest fire threatened the city of Kelowna, British Columbia
Edited sentence: A condition of this sale was that the purchasers would have to donate one back to Port Alberni when they are retired, as a historical attraction.Just over a year later, on 12 October 1962, the Caroline Mars was destroyed by Typhoon Freda while parked onshore.On 13 April 2007, TimberWest announced the sale of both aircraft to Coulson Forest Products, a local forestry company in Port Alberni, British Columbia.On 25 October 2007, the Hawaii Mars ("Redtail") arrived at Lake Elsinore in Southern California, on a private contract, to assist with the firefighting efforts containing the California wildfires of October 2007.The Philippine Mars is undergoing "extensive maintenance and renovation" and will not be ready to fly again until 2010.The two surviving tankers are based at Sproat Lake near Port Alberni.They appeared at local airshows, demonstrating their water-dropping ability.also flew the water bombers to other hotspots around the world when a need developed, such as in August 2003, when a large forest fire threatened the city of Kelowna, British Columbia