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.
Typical storage time 1 to 4 weeks. Lettuce is best harvested in warm weather, but this is also when demand for salad peaks, resulting in shortages at the start of a fine spell. Weather forecasts are used to predict surges in demand - but if these are wrong, the lettuces may be refrigerated for several days.