Cook pasta in a Dutch oven according to package directions, omitting salt and fat.
While water comes to a boil and pasta cooks, combine shrimp, 1 1/2 teaspoons olive oil, and 1/2 teaspoon crushed red pepper in a bowl; toss well to coat shrimp.
Heat a large nonstick skillet over medium-high heat 2 minutes or until very hot.
Add shrimp; saut 1 minute.
Remove shrimp from pan; set aside. Reduce heat to medium.
Add remaining 1 1/2 teaspoons oil, rosemary, and garlic to pan; saut 3 minutes or until fragrant.
Add wine and clam juice; bring to a boil over medium-high heat. Boil 5 minutes or until liquid is reduced by half.
Add remaining 1/4 teaspoon crushed red pepper, salt, and tomatoes; return to a boil over medium-high heat, and cook 5 minutes, stirring frequently. Stir in shrimp and any juices; remove from heat.
Drain pasta well, and return to Dutch oven.
Add shrimp mixture and parsley; toss well.
Serve immediately.
Fra diavolo (frah de-AH-voh-loh), which translates as "brother devil," is a term that refers to a spicy dish that's seasoned heavily with black or red pepper.