Submarine defense: Russian subs posing Pacific threat to US Navy. Military & Defense. March 18, 2016, 13:28 UTC+3. Ahead of Submariner Day marked on March 19 in Russia, TASS reviews Russian submarines that cause the US Navyâs greatest concern in the Pacific region.
What iceberg lettuce lacks in flavor it makes up for in crispness, versatility and storage length -- washed and stored correctly, a head of iceberg lettuce can last up to seven days in the refrigerator.
Some types, such as Bibb lettuce, form a loose head. Iceberg won't head tightly in warmer climates and you should treat it as a leaf lettuce and harvest the leaves as they get large enough to eat. Lettuce will head better if it stays cool. In warmer climates, it can be better to grow lettuce in the fall.