Pontoon bridge unprecedented 730-meter, fortified pontoon bridge across the Scheldt river at the Siege of Antwerp in 1584 to close off water access to the city. In the battle of Saraighat in 1671, the Ahoms spanned the river Brahmaputra at Saraighat over an improviso bridge of boats. In the 1670s, the French devised the copper pontoon; after this point, rivers and canals ceased to present significant obstacles. The early modern period in pontoon use was dominated by the wars of the 18th and 19th centuries during which the art and science of pontoon bridging barely changed. This however did not stop all
Junk food poll" (Baltimore); "Celebrities' favorite junk food" (Los Angeles); "A Nutritionist's Guide to National Junk Food Day" with "Rules for Splurging" ("Huffington Post"); and "It's National Junk Food Day: Got snacks?" (Kansas City). It is well-established that the poor eat more junk food overall than the more affluent, but the reasons for this are not clear. Few studies have focused on variations in food perception according to socio-economic status (SES); some studies that have differentiated based on SES suggest that the economically challenged don't perceive healthy food much differently than any other segment of the population. Recent research into scarcity, combining