diff --git a/5_1_Resending_a_Transaction_with_RBF.md b/5_1_Resending_a_Transaction_with_RBF.md
index c948a3d..76c8c1c 100644
--- a/5_1_Resending_a_Transaction_with_RBF.md
+++ b/5_1_Resending_a_Transaction_with_RBF.md
@@ -1,2 +1,46 @@
+# 4.1: Resending a Transaction with RBF
+
+> **NOTE:** This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning.
+
+Sometimes a Bitcoin transaction can get stuck. Usually it's because there wasn't sufficient transaction fee, but it can also be because of a one-time network or software glitch.
+
+## Watch for Stuck Transactions
+
+You should _always_ watch to ensure that your transactions go out. `bitcoin-cli listunspent` will show all of your incoming and outgoing transactions, while `bitcoin-cli gettransaction` with a txid will show a specific transaction. 
+
+The following shows a transaction that has not been put into a block. Note that it has no confirmations. 
+```
+$ bitcoin-cli gettransaction 0f618e38efe887028a5dd04d0e12241431978b4de32f70308c13a114d7cfcbd2
+{
+  "amount": -0.84927000,
+  "fee": -0.00000400,
+  "confirmations": 0,
+  "trusted": true,
+  "txid": "0f618e38efe887028a5dd04d0e12241431978b4de32f70308c13a114d7cfcbd2",
+  "walletconflicts": [
+  ],
+  "time": 1491588722,
+  "timereceived": 1491588722,
+  "bip125-replaceable": "no",
+  "details": [
+    {
+      "account": "",
+      "address": "n2eMqTT929pb1RDNuqEnxdaLau1rxy3efi",
+      "category": "send",
+      "amount": -0.84927000,
+      "vout": 0,
+      "fee": -0.00000400,
+      "abandoned": false
+    }
+  ],
+  "hex": "0200000001c6cb05c5212bb7ec14add72883a17f0a68aa399354bc2f7cf02df6e7d68a6937000000006a47304402203f21d769cbf3cf1626ef09bb35d0d8e88efe9f14d097f4b493628e96b2e1c90b0220162ff60701525e70942f5090dc48ec2b2f3b87cd40185351ab316991567f61c50121029045eaa55d283526c723e6d5495d9b3f077b545563f86465aafcd9bfdd50359effffffff0118e20f05000000001976a914e7c1345fc8f87c68170b3aa798a956c2fe6a9eff88ac00000000"
+}
+```
+A transaction can be considered stuck if it stays in this state for an extended amount of time. Not too many years ago, you could be sure it would go out _eventually_. But, that's nolonger the case due to the increased usage of the Bitcoin network. Now, if a Bitcoin transaction is stuck for too long, it will eventually drift out of the mempool, and then it will _never_ get placed in a block.
+
+_What is the mempool?_ The Bitcoin mempool (or Memory Pool) is the pool of all the unconfirmed transactions. Miners pull from it 
+
+## Set Your Transaction Fee
+
 1. Abandon, then rebuild, fulfilling all outputs
 2. Use bumpfee