Boil asparagus in a large pot of water for 2 minutes. Remove asparagus with a slotted spoon. Submerge aparagus in cold water to stop from cooking. Drain cold water and set asparagus aside.
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Cook pasta in same water. When pasta is done cooking drain and reserve 1 cup of water for cooking.
In a small bowl combine tomatoes, parsley and vinegar. Add salt for seasoning if desired.
Cook bacon in large skillet on medium heat. Remove bacon with a slotted spoon so it drains but leaves drippings in pan. Add cooked pasta to pan, toss to coat thoroughly and remove pan from heat.