The question of whether Kratos Defense & Security (NASDAQ: KTOS) will be around in five years took on a fresh sense of urgency last month after short-seller Spruce Point Capital called the company a "strong sell," sending shares down 11%. Spruce Point warned they believe the stock will fall much further, saying the company has 40% to 70% downside risk.Kratos shares in the weeks since have made back most of what was lost when Spruce Point went public with its criticism, but the longer-term question is still a relevant one.